6000.3.27f2

LTS · Released Oct 30, 2026 · Changeset 22188f149405 · 7 release notes

Unity 6.3 feature guide Unity release page Release notes (markdown) Open in Unity Hub

52build score

Upgrade risk+17Net cleanup+21Live debt+13

cohort: LTS (332)

How this number is computed

Composite = sum of sub_score × weight across six metrics. Sub-scores are percentile-rank(log1p(min(raw, p95))) within the LTS cohort (332 releases). Sub-scores for lower-is-better metrics are flipped to 100 − percentile.

Sub-score	Formula	Raw	Clip	%ile	Weight	Score	Contrib
Breaking surface	(breaking_change + api_change) / total_notes	0.015	0.015	76	25%	24	6.1
Blocker rate	blockers / total_notes	0.029	0.029	41	15%	59	8.9
Mobile risk	mobile_known_issues / total_notes	0.029	0.029	78	10%	22	2.2
Fix density	fixes / total_notes	0.809*	0.802	97	15%	97	14.6
Net-fix delta	((fixes − known_issues) − prior.(fixes − known_issues)) / total_notes	0	0	45	15%	45	6.7
Known-issue debt	known_issues / total_notes	0.103	0.103	34	20%	66	13.2
Composite							52

* = raw value was clipped at the cohort 95th percentile to prevent outliers from compressing everyone else's scores. Sub-scores marked "med" substitute the cohort median where the input was missing (e.g. first patch on a minor line has no prior patch for net-fix delta).

Crash with multiple stack traces when the main thread resumes after a USB audio output device is disconnected and reconnected

Linked bug report

UUM-158166: Crash with multiple stack traces when the main thread resumes after a USB audio output device is disconnected and reconnected

How to reproduce: Use a USB audio device as the only audio output Disable all other outputs in Windows Sound settings menu Open the attached “IN-158022” project Open the “Assets/AdtmRepro/AdtmRepro.unity” scene In the Menu bar, select “Repro → ADTM -> Log Audio State” Unplug the USB audio device Enter and exit Play mode several times, until the Console logs “FMOD failed to switch back to norma…

Retrieved 2026-11-10

Audio AuthoringKnown issueBlockerUUM-158166

Crash on mono_log_write_logfile when more than one copy of bee_backend is running

Linked bug report

UUM-142773: Crash on mono_log_write_logfile when more than one copy of bee_backend is running

How to reproduce: Create a new URP project In the Player settings, change the Active Input Handling setting to any other option In the following prompt about restarting the Editor, select "accept" When the Editor loading window appears, close it by clicking x at the top right corner of the window Open the Windows task manager and type "bee" in the search bar Launch the project again and let th…

Retrieved 2026-11-09

Scripting BuildtimeKnown issueBlockerUUM-142773

6000.3.27f2

Active known blockers2