UUM-141748

Fixed in 6000.6.0a7

Mentioned in 11 release notes.

First fixed in 6000.6.0a7 (Jun 11, 2026); relisted in 10 later releases.

Open on Unity Issue Tracker
VersionSectionRiskImpactNote
6000.6.0b9Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0b8Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0b7Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0b6Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0b5Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0b4Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0b3Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0b2Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0b1Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0a7Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.
6000.6.0a7Fixes
Editor
FixFixed an issue where the Timeline window would try to perform operations on an invalid cached Playable.

Pick your Unity version

Unity Releases compares releases against the version your project is on. Picking it now keeps Compare versions focused on what changes between where you are and where you might be going.