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Multiplayer: Removed redundant Button from Play Mode Scenario Validation Dialog.
Linked bug report
UUM-150409: 'Play Mode Scenario - Validation Failed' dialog box has two buttons with the same functionality

Steps to reproduce: Create and open a new project Install the 'Multiplayer Play Mode' package Create a new Play Mode Scenario Open the Object Picker for the Initial Scene in the Play Mode Scenarios window Click on the 'Hidden Packages' button to uncover read-only scenes Select one of the read-only scenes Switch to the new Play Mode Scenario Enter Play Mode and observe Actual results: A dialog …

Retrieved 2026-11-10
EditorFixUUM-150409
Multiplayer: The Play Mode instances status dropdown no longer opens an empty list when the active Scenario configuration is invalid, and now explains that the Scenario needs to be set up.
Linked bug report
UUM-151775: “Instances Status” dropdown shows empty list when no Build Profile is set for Local Instance of the active Play Mode Scenario

Reproduction steps: 1. Create a new project 2. Install Multiplayer Play Mode package (Window > Package Management > Package Manager > Unity Registry) 3. Open Play Mode Scenarios window (Window > Play Mode > Scenarios) and create a new Scenario 4. Add Local Instance to the newly created Scenario 5. Select the newly created Scenario as active Scenario 6. Click the “Idle” dropdown in the toolbar …

Retrieved 2026-11-10
EditorFixUUM-151775
OnCodeLoaded Scripting API documentation updated.
EditorFixUUM-155081
Pass "-nographics" command line switch to Editor worker processes if the main Editor process is started with it.
EditorFix
Prevent the Object Selector from hanging when selection opens a native modal dialog.
Linked bug report
UUM-139847: Object Selector becomes unresponsive when selecting root UI Document as Data Source for Add Binding in UI Builder

Steps to reproduce: Create a new project using 3D URP template Create a new UI Document (Assets > Create > UI Toolkit > UI Document) Open the .uxml file in UI Builder Add a Visual Element to the Hierarchy In the Inspector, choose any property (e.g. Text > Size) Click on the three dots to the left of the property and select "Add Binding" In the "Data Source" property click on the object picker …

Retrieved 2026-11-09
EditorFixUUM-139847
Print invalid define message instead of throwing.
Linked bug report
UUM-146349: "NullReferenceException" error is thrown in the Console when resetting Graphics Settings after adding a empty Shader Constant Define entry in Build Profiles

Steps to reproduce: 1. Create new Unity project using Universal 3D Template 2. Open Build Profiles window and switch to Web Platform 3. Below add Graphics Settings 4. Expand Shader Constant Defines foldout and press “+” 5. Above Graphics Settings, on the right side, press on kebab button and select “Reset” 6. In “Reset Settings” pop-up press “Reset” 7. In “Unapplied Changes” pop-up press “Appl…

Retrieved 2026-11-09
EditorFixUUM-146349
Project Auditor: add OnRenderImage to list of known MonoBehaviour methods.
EditorFix
Project Auditor: Added a warning to users if URP shader stripping is disabled.
EditorFix
Project Auditor: added severity breakdown section to Upgrade UI.
EditorFix
Project Auditor: always start at the Summary screen when opening the window.
EditorFixUUM-138137
Project Auditor: Direct users to the new Build Analysis window.
EditorFixUUM-142324
Project Auditor: don't show blank group when Target Framework version is unknown.
EditorFixUUM-154764
Project Auditor: ensure all anim clips are scanned/analyzed.
EditorFix
Project Auditor: ensure GameObject issues have a Location assigned.
EditorFix
Project Auditor: Ensure obsolete API upgrade detection works on methods.
EditorFixUUM-143475
Project Auditor: ensure UI correctly pluralizes "seconds" when listing analysis times.
EditorFixUUM-155736
Project Auditor: fix tree view scrollbar to remain constant when selection changes.
EditorFixUUM-147228
Project Auditor: Fixed a category showing an empty issue list instead of the analysis-in-progress panel while its own analysis was still running.
EditorFixUUM-147586
Project Auditor: Fixed a NullReferenceException thrown when a null rule list, or a list containing a null Rule, was passed to AnalysisParams.WithAdditionalDiagnosticRules.
EditorFixUUM-150696
Project Auditor: Fixed an issue where an invalid window layout message would display.
Linked bug report
UUM-139591: Project Auditor - 'Cannot save invalid window Failed to load' after closing editor with Project Auditor open

I open and close the editor (with no other windows present) I don't generate any items in the console after restarting the editor, but if I have the Project Auditor open when the Editor restarts it looks to log Cannot save invalid window Failed to load (UnityEditor.FallbackEditorWindow) to layout. UnityEditor.WindowLayout:LoadDefaultWindowPreferences () (at /Users/richard.pickering/Documents/G…

Retrieved 2026-11-09
EditorFixUUM-139591
Project Auditor: Fixed an issue where the analysis progress bar could complete before the analysis finished.
EditorFixUUM-144829
Project Auditor: Fixed issue where Project Auditor is missing build usage mesh read/write issues for ParticleSystemRenderer.
EditorFixUUM-146284
Project Auditor: Fixed sections not refreshing with their results until the full analysis is completed, instead of updating as soon as that section's own analysis finished. (UUM-144826).
Linked bug report
UUM-144826: Project Auditor - Sections not refreshing until Code analysis has completed

If you highlight a section that is in progress once it finishes it doesn't seem to update the page (it only updates once the code analysis finishes (or if you move away and back again) [Internal link] Steps to reproduce: Start a new Analysis Click into a section that hasn't finished yet (such as Game Objects) Notice the information says the Analysis is still running but the icon from that sect…

Retrieved 2026-11-09
EditorFixUUM-144826
Project Auditor: improved UI display of Roslyn issues.
EditorFix
Project Auditor: Support RSP files when performing Code analysis.
EditorFixUUM-147287
Refactored and fixed import sample dependencies problems.
Linked bug report
UUM-143035: “Import” buttons incorrectly change to “Reimport” for non-imported Samples after importing multiple Samples from “All Samples” section

Steps to reproduce: Create new Unity project using Universal 3D Template Open Package Manager window Select “All Samples” section Scroll down through the list Import these samples: “URP RenderGraph Samples, “URP Package Samples”, “Render Shader User Value Samples” After importing these samples, select any other Sample Observe “Import” button Actual results: After importing multiple samples (e.…

Retrieved 2026-11-09
EditorFixUUM-143035
Reinstate 2 Project Auditor analyzers that will not be migrated to the Rules package.
EditorFixUUM-150288
Removed empty parentheses from SRP Batcher compatibility reason in the shader Inspector.
EditorFixUUM-152574
Removed RenderCommandTypeHelpers::IsRenderingCommandSupportedInsideRenderPass.
EditorFixUUM-150531
Removed the "Missing or broken path()" message displayed in the 'Open Recent Scene' dropdown on a newly created project. ([UUM-113848](https://jira.unity3d.com/browse/UUM-113848)).
Linked bug report
UUM-113848: "Missing or broken path ()" is shown when opening the "Open Recent Scene" dropdown on a newly created project

Steps to reproduce: Create a new Unity project using the Universal 3D template Observe the "Open Recent Scene" dropdown (File > Open Recent Scene) Actual results: "Missing or broken path ()" is in the dropdown along with SampleScene Expected results: Only SampleScene is shown on a fresh project Reproducible with versions: 6000.0.54f1, 6000.1.16f1, 6000.2.0f1, 6000.3.0a4 Tested on (OS): Windows…

Retrieved 2026-11-09
EditorFixUUM-113848
Renamed "SymbolTable" to "Symbol Table" in Build Profiles window.
EditorFixUUM-150724
Render Pipeline Core: Fixed modified asset warning when performing cross platform builds.
Linked bug report
UUM-146719: "The following asset(s) located in immutable packages were unexpectedly altered" Warning is thrown when creating cross platform builds or duplicating Build Profiles

Steps to reproduce: Create a new 3D URP project Create a Build Profile for a platform thats different from the Editor platform (IE on Linux Editor build for Windows, or on macOS build for Web) Switch to the created Build Profile Wait for background compilation processes to finish Build and run the project Observe the Console window Actual results: "The following asset(s) located in immutable p…

Retrieved 2026-11-09
EditorFixUUM-146719
Replace OpenJDK in-tree zips with Stevedore artifacts.
EditorFix
Runtime Rendering Debugger - Do not store the useDiagnostics in the CoreBuild data to strip the resources.
EditorFixUUM-151146
Scenario hang on with an Initial Scene from a read-only package.
Linked bug report
UUM-147441: Player gets stuck in a "Stopping" loop when entering Play mode with a Scenario using a Scene from a read-only package

Reproduction steps: 1. Create a new project 2. Install Multiplayer Play Mode package (Window > Package Management > Package Manager) 3. Open Play Mode Scenarios window (Window > Play Mode > Scenarios) and create a new Scenario 4. Add an additional Editor Instance and attach any Scene Asset that isn’t “SampleScene” (e.g. “Basic”) to the newly created Scenario 5. Select the newly created Scenari…

Retrieved 2026-11-10
EditorFixUUM-147441
ScreenCapture.CaptureScreenshotAsTexture() renders screen capture with borders.
Linked bug report
UUM-130878: ScreenCapture.CaptureScreenshotAsTexture() returns black borders that are present in Game view when using different resolution

Reproduction steps: 1. Open the attached project Repro Project in the latest comment 2. Open the “/Assets/Scenes/SampleScene.unity” Scene 3. Enter a new "Fixed Resolution 1280x720" item in the Game view aspect drop-down 4. Select the 1280x720 aspect item 5. Resize the GameView so that around the rendered image Unity Editor displays dark gray borders 6. Enter the Play Mode 7. Wait until the Pla…

Retrieved 2026-11-09
EditorFixUUM-130878
Search : Fixed "Non-matching Profiler.EndSample" error is thrown for "SearchImporter.IndexingRequest" when creating a script with Edit Mode Profiler recording enabled.
Linked bug report
UUM-143780: "Non-matching Profiler.EndSample" error is thrown for "SearchImporter.IndexingRequest" when creating a script with Edit Mode Profiler recording enabled

Steps to reproduce: Create a new 3D URP project Open the Profiler window (Window > Analysis > Profiler) Switch Target to "Edit Mode" and enable recording In the Project window, right-click > Create > MonoBehaviour Script Repeat 4th step a few times or wait a bit (sometimes error comes with a delay) Observe the Console Actual results: "Non-matching Profiler.EndSample (Every EndSample call must …

Retrieved 2026-11-09
EditorFixUUM-143780
Show in Project (the row context menu and the inspector Select button) silently did nothing for renamed/deleted assets. Both entry points now disable the action when the asset can no longer be resolved, and surface a non-modal "Asset not found" notification if it is triggered otherwise.
EditorFixUUM-143853
Skip post-build audit when Project Auditor Rules package isn't installed.
Linked bug report
UUM-152518: "InvalidOperationException" is thrown after every build when "Log number of issues after Build" is enabled even though Project Auditor is not used

Steps to reproduce: Create a new 3D URP project Open Edit > Preferences > Analysis > Project Auditor Enable "Log number of issues after Build" property Build the project with any empty scene Observe the Console after build Actual results: "InvalidOperationException: Install the Project Auditor Rules package before using Project Auditor" error is thrown after each build Expected results: No err…

Retrieved 2026-11-10
EditorFixUUM-152518
SpriteMask not rendering on Android, iOS, and Web when "Strip Engine Code" is enabled and the Tilemap package is disabled in Package Manager'.
EditorFixAndroidiOSUUM-138419
Support for the SpeedTreeWindAsset created in the 2022 Editor.
Linked bug report
UUM-147077: 2022 trees are not affected by wind in Unity 6

Steps to reproduce: Create a terrain with trees and a wind zone in Unity 2022 Load the terrain in Unity 6 Notice that the trees are not affected by the wind zone Actual results: Trees are not affected by the wind zone. Grass is Expected results: The trees are affected by wind zone Reproducible with versions: Unity 6+ Not reproducible with versions: 2022 Can’t test with versions: Tested on (OS)…

Retrieved 2026-11-10
EditorFixUUM-147077
The Build Analysis window's Assets tab now shows the asset breakdown for scripts-only and incremental Player builds by attributing them to the source build whose content they reused (previously empty for these builds).
Linked bug report
UUM-142982: Build Analysis: Empty "Assets" window for scripts-only builds

Steps to reproduce: Create a project File -> Build Profiles -> Add Build Profile Select the macOS platform and click the "Create Build Platform" button Create a build Window -> Analysis -> Build Analysis Verify that the build data is displayed in the "Assets" tab Click the kebab menu and select "Delete All Builds..." Return to the Build Profiles window and create one more build Return to the "…

Retrieved 2026-11-09
EditorFixUUM-142982
The collapse repeat-count badge inherited the white selection-text color, making the count invisible on its light pill in the Light theme. The badge now sets its own theme text color.
EditorFixUUM-143790
The headless Linux Editor cpu core count computation when run within a container that has CPU resource limits. Affinity mask and Cgroup settings will now be taken into account. Note that changing the affinity while the Editor is running will not have any affect on its CPU usage as the value is cached at application startup.
EditorFixLinuxUUM-145740
The Overview Log column showed the entire multi-paragraph message as an auto-tooltip. The tooltip has been removed; the full message is shown in the detail pane when a row is selected.
EditorFixUUM-143232
This PR fixed a bug where reordering GameObjects showed the "+" (add) icon instead of the arrow icon by mappping DragVisualMode.Move to DragAndDropVisualMode.Link.
Linked bug report
UUM-115073: Hierarchy V2 is using Add object Icon when reordering objects

Steps to reproduce: Open the attached project Open the TestScene Drag one of the Objects in the Hierarchy to reorder it Observe the Icon while reordering Actual results: Add new Object Icon is being used while reordering objects in the Hierarchy. The Same Icon can be seen when dragging objects into the Scene from the Project window Expected results: An Arrow Icon is displayed while reordering …

Retrieved 2026-11-09
EditorFixUUM-115073
Turn off GRD in URP and HDRP templates.
Linked bug report
UUM-143179: "Internal: JobTempAlloc has allocations that are more than the maximum lifespan of 4 frames old" warnings are spammed in the Console when focusing Scene view in a HDRP template project

How to reproduce: 1. Create a new Unity High Definition 3D sample project 2. Open the SampleScene 3. Focus the Scene view and observe the Console Expected results: No memory leak warnings are thrown Actual results: 18 pairs of warnings are thrown within ~700 ms: - "Internal: JobTempAlloc has allocations that are more than the maximum lifespan of 4 frames old - this is not allowed and likely a …

Retrieved 2026-11-09
EditorFixUUM-143179
Universal Render Pipeline: Fixed outdated asset importer warnings when creating a project from the URP 3D Sample template.
EditorFixUUM-146261
Updated Content Directories to take Application.backgroundLoadingPriority into account when loading.
EditorFixUUM-154823
Updated Stats window to use M suffix for triangle and vertex counts 1 million or greater.
Linked bug report
UUM-146878: Game View Stats window formats Triangles and Vertices in thousands ("k") instead of millions ("M") when counts exceed 1,000,000

How to reproduce: Open the attached “repro-147692.zip” project Open Game View Click the “Stats” button in the top right toolbar of the Game View Observe the "Triangles" and "Vertices" values in the Statistics window Actual result: The "Triangles" and "Vertices" values are displayed in thousands (Triangles: 10315.9k Vertices: 16661.2k) Expected result: The "Triangles" and "Vertices" values are …

Retrieved 2026-11-10
EditorFixUUM-146878
Updated the dialog that appears when Unity detects scene backups from an Editor session that did not close correctly. The dialog is now titled Scene Backup Detected, and its Keep Backups and Delete buttons state whether the backups are kept in Assets/_Recovery/ or discarded.
EditorFixUUM-147629
Updated WinEditor's warning dialog text when running Unity with elevated privileges.
Linked bug report
UUM-146796: Running Unity as an Administrator prompts a truncated message

Steps to reproduce: On a Windows OS, locate an affected Unity.exe file RMB the file and choose Run as Administrator Accept the Windows OS prompt to run Observe the "Unity is running as administrator" pop up. Actual results: The message exceeds 512 characters and is truncated Expected results: The message is shortened to not exceed the maximum 512 characters Reproducible with versions: 6000.0.1…

Retrieved 2026-11-10
EditorFixUUM-146796
Updating package while an MPPM clone is active causes the clone to crash.
EditorFixUUM-148292
USS files that import a built-in theme are now reimported automatically when the referenced theme changes.
EditorFix
When building a Web player with Progressive Asset Loading using the build scripting API, the build will fail (with a helpful error message) if incompatible settings are enabled.
EditorFix
XR: Removed the obsolete and unused AR module, the UnityPlayer.initializeGoogleAr() method, and the use of the unity.arcore-enable manifest metadata key.
EditorXR
Fixed a crash when no wl_seat is present on the system.
EmbeddedLinuxFixUUM-148754
Fixed case where first touch input is dropped.
EmbeddedLinuxFixUUM-150086
Fixed empty publish section being shown.
EmbeddedLinuxFixUUM-144616
Fixed for Screen.SetResolution produces a blank screen when used with FullScreenMode.MaximizedWindow.
EmbeddedLinuxFixUUM-143541
Fixed performance metrics being reported without a sum, which prevented average values from being calculated.
Engine DiagnosticsFixUUM-155716
Fixed a bug where a scene's GameObjects would disappear from the Hierarchy window after exiting Play mode when a SubScene referenced the same scene.
Linked bug report
UUM-148713: GameObjects no longer appear in Hierarchy V2 when reopening a Scene that was streamed as an Entity Scene during Play mode

How to reproduce: Open the attached “IN-149292_repro” project Open “TestEnvLevel2” Scene and observe the GameObjects in the Hierarchy tab Open “Launcher” Scene Enter Play mode and wait until the Game view loads completely Exit Play mode Open the “TestEnvLevel2” Scene and observe the result in the Hierarchy tab Actual result: The Scene’s GameObjects are not displayed in the Hierarchy tab, altho…

Retrieved 2026-11-10
EntitiesFixUUM-148713
Fixed a memory leak in the EntityNameStorage by properly disposing NameStoreAccess.
Linked bug report
UUM-147280: "Leak Detected: Persistent allocates N individual allocations" logged when changing Editor Font with Entities package installed

Steps to reproduce: Create a new 3D URP project Install the Entities package (com.unity.entities) Go to Unity > Settings > Preferences > General Change the "Editor Font" property to a different option Observe the Console Actual results: A "Leak Detected: Persistent allocates N individual allocations" log is thrown in the Console Expected results: No leak occurs Reproducible with versions: 6000…

Retrieved 2026-11-10
EntitiesFixUUM-147280
Fixed a race condition in EntityId allocation pool initialization. This was likely to happen when loading a scene containing multiple SubScenes in the editor.
EntitiesFixUUM-147566
Fixed a NullReferenceException that occurred when pressing the "+" button in the Systems window search field with "Show All Worlds" enabled during Play Mode.
Linked bug report
UUM-146668: "NullReferenceException" is thrown in the Console when pressing the "+" button in the Systems window Search field with "Show All Worlds" enabled

Steps to reproduce: 1. Create new Unity project using Universal 3D Template 2. Open package manager window and install Entities package 3. Open Systems window (Window > Entities > Systems) 4. Click on a kebab button in Systems window and select “Show All Worlds” 5. Press “+” button in Search field 6. Observe the Console window Actual results: “NullReferenceException: Object reference not set t…

Retrieved 2026-11-09
EntitiesFixUUM-146668
Fixed an ArgumentNullException during Sub Scene import after clearing the Scene Asset of a Sub Scene.
EntitiesFix
Fixed an assertion failure and duplicate SubScene registration that occurred on domain reload in scenes containing multiple SubScenes.
EntitiesFixUUM-147566
Fixed an editor crash (SIGSEGV) that occurred when dragging a SubScene into another SubScene that references the same scene asset.
Linked bug report
UUM-142972: Editor crashes with SIGSEGV when dragging a Sub Scene into a duplicated Sub Scene

Steps to reproduce: 1. Create new Unity project using Universal 3D Template 2. Open Package Manager window and install Entities package 3. In Hierarchy window create a Sub Scene 4. Duplicate created Sub Scene 5. Drag first Sub Scene to duplicated Sub Scene 6. Observe the Editor Actual results: The Editor crashes with a SIGSEGV when draggin duplicated Sub Scene to original Sub Scene Expected re…

Retrieved 2026-11-09
EntitiesFixUUM-142972
Fixed an error "Failed to find Entity child node" in the New Hierarchy when removing child status from a GameObject that was added to an existing parent inside a Sub Scene.
Linked bug report
UUM-146762: "Failed to find Entity child node" error is thrown when removing child status from a GameObject inside a Sub Scene

Reproduction steps: 1. Create a new project 2. Install Unity Physics package (Window > Package Management > Package Manager) 3. Create new Sub Scene (New Sub Scene > Empty Scene…) 4. Create any GameObject inside the Sub Scene 5. Create a child GameObject for the newly created GameObject 6. Drag the child GameObject out to remove its child status 7. Observe the Console Actual result: "Failed to…

Retrieved 2026-11-09
EntitiesFixUUM-146762
Fixed an exception in the Hierarchy window when setting "Type of Worlds Shown" to include all world types.
Linked bug report
UUM-146725: "InvalidOperationException" and "ArgumentException" errors thrown in the Console when opening SampleScene after New Sub Scene is opened

Steps to reproduce: 1. Open the attached Unity project from Google Drive link “EntitiesErrors.zip” 2. Open New Sub Scene (Assets > Scenes > SampleScene > New Sub Scene.unity) 3. Open SampleScene (Assets > Scenes > SampleScene.unity) 4. Observe the Console window Actual results: “InvalidOperationException” and “ArgumentException” errors thrown in the Console window Expected results: No errors t…

Retrieved 2026-11-09
EntitiesFixUUM-146725
Fixed an InvalidOperationException ("does not exist in the hierarchy") being logged repeatedly in the console after switching away from a scene with an open Sub Scene and switching back.
EntitiesFix
Fixed an InvalidOperationException when searching by component type in the Hierarchy window while a SubScene is loading.
Linked bug report
UUM-142749: InvalidOperationException error gets thrown when domain reloads while filtering entities components

Steps to reproduce: 1. Open the attached “IN-143441_BugReporting.zip“ project 2. Open the “Scene” scene 3. If not enabled, enable Hierarchy V2 (Unity → Settings → General) 4, In the Hierarchy search field, enter “t:LocalTransform” 5. Enter Play Mode 6. Observe the Console window Actual result: InvalidOperationException error gets thrown in the Console Expected result: No errors are thrown Repr…

Retrieved 2026-11-09
EntitiesFixUUM-142749
Fixed an issue in the Systems window where the toolbar and search bar would shrink when viewing a large number of systems.
EntitiesFixUUM-146060
Fixed an issue where editing a read-only nested text field in the Entity Buffer Inspector threw an AccessViolationException. The read-only field is now properly disabled.
Linked bug report
UUM-148905: "AccessViolationException" error thrown when editing read-only nested field in Entity Buffer Inspector during Play Mode

Steps to reproduce: 1. Create new Unity project using Universal 3D Template 2. Open Package Manager 3. Install packages: Entities and Netcode for Entities 4. When installed, enter Play Mode 5. Select Entity from ClientWorld in Hierarchy 6. In Inspector window expand Buffer foldout 7. Press “+ Add Element” 8. Expand: Element 0 > One Despawn > Tick 9. Change Tick Value to “1” 10. Observe the Con…

Retrieved 2026-11-10
EntitiesFixUUM-148905
Fixed an issue where rebuilding an unchanged project produced different content archives, causing published remote content to be downloaded again.
Linked bug report
UUM-151571: ECS content builds produce non-deterministic RemoteContent files when consecutively building and publishing unchanged assets

How to reproduce: Open the attached “IN-149444_repro.zip” project Navigate to File -> Build Profiles -> Switch Profile → Build Select the “Builds/Test_Build” folder Navigate to Assets -> Publish -> Existing Build Select the “Builds/Test_Build” folder Rename the generated “Windows-RemoteContent” folder to “Windows-RemoteContent-Old” Navigate to File -> Build Profiles -> Build Select the “Builds…

Retrieved 2026-11-10
EntitiesFixUUM-151571
Fixed an issue where renaming a subscene asset in the Project view would not update the subscene name displayed in the Hierarchy window.
EntitiesFixUUM-143368
Fixed an issue where the authoring representation of an object would be shown instead of the runtime representation, when selecting the object through Entities Hierarchy.
Linked bug report
UUM-152665: Inspector window shows the authoring prefab instead of the entity's components when selecting an entity in the Entities Hierarchy window

How to reproduce: 1. Open the attached “IN-149509” project 2. In the Project window, open the "Assets/Repro/ReproScene" scene 3. In the Hierarchy window, enable “ReproSubScene” 4. Enter Play Mode 5. In the Entities Hierarchy window (Window → Entities → Hierarchy), select "ReproSpawner" 6. Observe the Inspector window Actual result: The Data Mode switch is not drawn in the Inspector window and …

Retrieved 2026-11-10
EntitiesFixUUM-152665
Fixed an issue where WeakReference fields showed "None" when assigned by GUID from code.
Linked bug report
UUM-134270: "EntityPrefabReference" field appears unassigned in Inspector when assigning a prefab through code

How to reproduce: 1. Open the attached "IN-133920" project 2. Open the Scene "SampleScene" 3. Enter Play mode 4. Observe the Console window 5. Exit Play mode 6. At the top of the window press Reproduction → Assign EntityPrefabReference 7. Enter Play mode again 8. Observe the Console window and the "My SO" ScriptableObject Actual result: From the DebugLog, you can see that EntityPrefabReference…

Retrieved 2026-11-09
EntitiesFixUUM-134270
Fixed an outdated deprecation warning in the Entities Hierarchy window that incorrectly referenced a Preferences toggle that no longer exists.
Linked bug report
UUM-146983: Outdated deprecation warning is displayed when opening the Entities Hierarchy window

How to Reproduce: 1. Create a new Unity project 2. Install Entities package from Package Manager 3. Go to Window → Entities and click “Hierarchy (Deprecated)” 4. Observe the warning in the "Entities Hierarchy" window Actual Result: Warning says: "The Entities Hierarchy window is deprecated and will be removed in a future version. Entities have now been integrated into the new Hierarchy window.…

Retrieved 2026-11-10
EntitiesFixUUM-146983
Fixed an ArgumentOutOfRangeException thrown when clicking items in the Systems window after domain reload.
Linked bug report
UUM-148748: “ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection” errors are thrown when clicking on items in the Systems window after domain reload with “Show All Worlds” enabled

Reproduction steps: 1. Create a new project 2. Install Entities package (Window > Package Management > Package Manager) 3. Window > Entities > Systems 4. Click on kebab menu and enable "Show All Worlds" option in the Systems window 5. Click on any item in the Systems window tree view 6. Trigger domain reload (e.g. Create > MonoBehaviour Script) 7. Click on any item in the Systems window tree v…

Retrieved 2026-11-10
EntitiesFixUUM-148748
Fixed an ObjectDisposedException and leaked world nodes in the Entities Hierarchy when a world is disposed.
EntitiesFixUUM-146293
Fixed and re-enable unstable System window search tests.
EntitiesFixUUM-147320
Fixed case of project build failing with "IL2CPP error C2039: __entity is not a member of BlobBuilder" error.
Linked bug report
UUM-86534: Build fails with the "IL2CPP error C2039: __entity is not a member of BlobBuilder" error when building a specific project

Reproduction steps: 1. Open the attached “repro_IN-87613“ project 2. Open the “Assets/Scenes/main.unity“ Scene 3. Open the Build Profiles window (“File → Build Profiles”) 4. Make sure that the “Architecture“ parameter is set as “Intel 64-bit“ 5. Make sure that the “Development Build“ is enabled 6. Press “Build“ Expected result: The build succeeds Actual result: The build fails with the “error …

Retrieved 2026-11-10
EntitiesFixUUM-86534
Fixed clear ("x") button in Entities search bars remaining visible after deleting all query blocks via right-click.
Linked bug report
UUM-146465: Clear ("x") button remains visible in the Entities Systems window search bar after deleting all query blocks

Steps to reproduce: Create a new 3D URP project Install com.unity.entities package Go to Window > Entities > Systems Click the "+" icon in the search bar and add any query block RIght-click on the added block and Delete Observe the "x" at the end of the Search bar Actual results: The clear ("x") button is still displayed at the end of the search bar after the query block is deleted, even thoug…

Retrieved 2026-11-09
EntitiesFixUUM-146465
Fixed Entities Memory Profiler showing duplicate components when multiple worlds share the same archetype.
Linked bug report
UUM-146419: Memory Profiler shows duplicate components when multiple worlds share the same archetype

The Entities Memory Profiler displays duplicate component entries for archetypes when multiple worlds exist. The number of duplicates scales with the number of worlds - with 3 worlds, each component is shown 3 times. Steps to Reproduce 1. Create multiple worlds (e.g., ServiceWorld, ServerWorld, ClientWorld) 2. Ensure they share common archetypes 3. Open the Profiler window and select the Entit…

Retrieved 2026-11-09
EntitiesFixUUM-146419
Fixed Entities, Worlds, and SubScenes appearing in the Hierarchy window when editing UI Toolkit assets.
EntitiesFixUUM-145824
Fixed GameObjects in an open SubScene disappearing from the Hierarchy window after the SubScene GameObject was disabled and enabled.
Linked bug report
UUM-154731: Sub Scene GameObjects disappear from the Hierarchy after disabling and enabling an opened Sub Scene GameObject

Reproduction steps: 1. Create a new project 2. Install the "Entities" package (Window > Package Management > Package Manager) 3. Create a Sub Scene in the Hierarchy (GameObject > New Sub Scene > Empty Scene...) 4. Right-click the newly created Sub Scene in the Hierarchy and any GameObject under it (e.g. 3D Object > Cube) 5. Save changes 6. Select the Sub Scene GameObject in the Hierarchy and m…

Retrieved 2026-11-10
EntitiesFixUUM-154731
Fixed IDebugOnAdded callbacks receiving default values instead of the actual component value, and fixed ECB.Instantiate not firing OnAdded callbacks.
Linked bug report
UUM-145910: The "ref" input argument in IDebugOnAdded and IDebugOnRemoved does not reflect the component values set in the AddComponentData call

Reproduction steps: Open the attached “IN-146662” project Enter Play mode Observe the Console window Actual Result: An “Added 0, EXPECTED 1 or 2 from AddComponentData call” message is logged Expected result: The message says that 1 or 2 were added Reproducible with: 6000.6.0b1, 6000.7.0a1 Couldn’t test with: 6000.0.77f1, 6000.3.18f1, 6000.5.0b11 (IDebugOnAdded and IDebugOnRemoved do not exist)…

Retrieved 2026-11-09
EntitiesFixUUM-145910
Fixed Ignoring invalid [UpdateAfterAttribute] warning on the ExplicitFilterSystem when disposing the Hierarchy World Handler.
Linked bug report
UUM-146672: "Ignoring invalid [UpdateAfterAttribute]" warning is thrown in the Console when changing Type Of Worlds Shown to "None" in Entities Preferences window

Steps to reproduce: 1. Create new Unity project using Universal 3D Template 2. Open package manager window and install Entities package 3. Go to Edit > Preferences > Entities 4. Change Type Of Worlds Shown from “Live” to “None” 5. Observe the Console window Actual results: “Ignoring invalid [Unity.Entities.UpdateAfterAttribute] attribute on Unity.Entities.Editor.ExplicitFilterSystem targeting …

Retrieved 2026-11-09
EntitiesFixUUM-146672
Fixed leaked world nodes in SchedulePacking_WithInitialChanges_LinearOperationMode.
Linked bug report
UUM-148849: Crash on void HierarchyStream::WriteAll when running tests with large Entity worlds and the new Hierarchy window open

How to reproduce: Open the attached project “IN-148540” Ensure that the new Hierarchy is enabled in Preferences Open the Test Runner window (Window → General → Test Runner) Run the “Entities Workspace → Unity.Entities.Editor.PerformanceTests.dll” tests Observe the crash Reproducible with: 6000.5.0a7, 6000.5.7f1, 6000.6.0b7, 6000.7.0a4 Not reproducible with: 6000.3.21f1, 6000.5.0a6 Could not te…

Retrieved 2026-11-10
EntitiesFixUUM-148849
Fixed NullReferenceException in the HierarchyEntityHandler when leaving the VisualElementEditingStage from the new Hierarchy.
Linked bug report
UUM-146747: "NullReferenceException" is thrown in the Console when navigating back from the UI Toolkit authoring Hierarchy to Editor Hierarchy with Element created in New Sub Scene

Steps to reproduce: 1. Create new Unity project using Universal 3D Template 2. Open package manager window and install Entities package 3. In Hierarchy window create New Sub Scene 4. Right-click on New Sub Scene (under Global Volume) and create Button element in Hierarchy (GameObject > UI Toolkit > Standard Elements > Button) 5. Press “Continue” in Open visual element editing stage pop-up 6. S…

Retrieved 2026-11-09
EntitiesFixUUM-146747
Fixed performance regressions related to transform hierarchy children access.
EntitiesFixUUM-138633
Fixed stale entity subscene nodes in the new Hierarchy when using the AutoLoadScene property on subscenes.
Linked bug report
UUM-143057: Two Sub Scenes are displayed under Editor World after toggling "Auto Load Scene" on a closed and reopened Sub Scene

Steps to reproduce: Create a new 3D URP project Make sure "Use new Hierarchy window" is enabled in Preferences > General Install Entities package (com.unity.entities) In the Hierarchy, right-click > New Sub Scene > Empty Scene and save it Select it In Hierarchy and click "Close" on the Sub Scene Component in the Inspector Click "Open" Uncheck "Auto Load Scene" Check again "Auto Load Scene" Obs…

Retrieved 2026-11-09
EntitiesFixUUM-143057
Fixed subscene reimport so that it no longer creates entities that are never removed.
Linked bug report
UUM-148293: "Import failed..." error and new accumulating entities are created when Reimporting a Sub Scene a few times

Steps to reproduce: Create a new 3D URP project Install Entities package (com.unity.entities) In the Hierarchy, right-click > New Sub Scene > Empty Scene and save it Select it In Hierarchy and click "Close" on the Sub Scene Component in the Inspector Fully expand Sub Scene under Editor World Select the Sub Scene in normal Hierarchy (not under Editor World) In the Inspector, click "Close" Click…

Retrieved 2026-11-10
EntitiesFixUUM-148293
Fixed the entity list foldout under a SubScene in the Hierarchy collapsing after an undo of reordering or reparenting SubScenes.
Linked bug report
UUM-147837: Entity list foldout under a Sub Scene in the Hierarchy closes when reordering that Sub Scene and pressing Undo

Steps to reproduce: Create a new Unity project using the Universal 3D template Install the Entities package (com.unity.entities) Create two Sub Scenes in the Hierarchy (Entities package installed) Under the "Editor World" section, expand the entity list foldout for each Sub Scene (the one showing the baked Entities, not its GameObject children) Reorder one of the Sub Scenes in the Hierarchy (d…

Retrieved 2026-11-10
EntitiesFixUUM-147837
Fixed the SubScene foldout icon disappearing in the Hierarchy window after undoing changes to the SubScene GameObject.
Linked bug report
UUM-143812: Hierarchy V2 SubScene foldout/expand icon disappears after undoing changes to the SubScene

Steps to reproduce: Create a new 3D URP project Make sure "Use new Hierarchy window" is enabled in Preferences Install the Entities package In the Hierarchy, right-click > New Sub Scene > Empty Scene and save it Right-click on the SubScene and select GameObject > Create Empty Select the SubScene and in the Inspector modify anything (e.g. change Position value) Click "Ctrl+Z" to undo Observe th…

Retrieved 2026-11-09
EntitiesFixUUM-143812
Fixed the Systems window world dropdown to exclude internal world types that could cause an ArgumentException when selected.
Linked bug report
UUM-148241: Entities Systems window throws “WorldProxy” error when switching to “LoadingWorld3” world

Steps to reproduce: 1. Create new Unity project using Universal 3D Template 2. Install Entities package via Package Manager window 3. In Hierarchy create new Sub Scene 4. Open Preferences window and go to Entities section 5. Enable “Show Advanced Worlds” 6. Open Systems window (Window > Entities > Systems) 7. Click on “Default World” dropdown 8. Select “LoadingWorld3” 9. Observe the Console wi…

Retrieved 2026-11-10
EntitiesFixUUM-148241
Fixed unsaved changes in a Sub Scene being lost when changing its Scene Asset and pressing Cancel in the save prompt.
EntitiesFix
Fixed unsaved changes in a Sub Scene being lost without a save prompt when a duplicate Sub Scene that references the same scene was deleted or had its Scene Asset changed.
Linked bug report
UUM-154590: Unsaved changes in a Sub Scene are lost without a save prompt when a Sub Scene GameObject referencing it is deleted

How to reproduce: 1. Create a new project 2. Install the "Entities" package (Window > Package Management > Package Manager) 3. Create two Sub Scenes, "SubScene1" and "SubScene2", and add a few GameObjects to "SubScene2" 4. Save changes 5. Rename one of the GameObjects in "SubScene2" and do not save 6. In "SubScene1", create an empty GameObject, add a "Sub Scene" Component and set its Scene Ass…

Retrieved 2026-11-10
EntitiesFixUUM-154590
In the editor, every subscene load used to leak a duplicate of each loaded GameObject until domain reload; only the intended instances are now created.
EntitiesFixUUM-145926

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