Unreal Engine Issues
Unreal Engine Issues
Rare crash in FWidgetAnimationState::OnStopped
UE - Anim - Sequencer - Jun 22, 2026The FWidgetAnimationState::OnStopped delegate is getting created when the widget anim state is being destroyed and then queued to be executed later. Something is happening between the queue and the ...
Sequencer - if you set the Take Separator to - rather than _ the New Take naming will mess up
UE - Anim - Sequencer - Jun 9, 2026When using a non-default take separator (eg "-") the "New Take" option produces a malformed proposed name for the take. ...
Crash in UWidgetAnimation::CreateDirectorInstance when switching resolution
UE - Anim - Sequencer - Jun 2, 2026Hello, We've encountered a crash in UWidgetAnimation::CreateDirectorInstance when repeatedly switching resolutions. We've had it for a while but it's not until recently that we've found a consisten ...
Backout attempted fix for - AutoSize triggers ensure on shortened Skel Anim Section moved past anim length
UE - Anim - Sequencer - May 29, 2026In Sequencer, calling "Edit > Auto Size" on a UMovieSceneSkeletalAnimationSection triggers the LowerBound > UpperBound ensure in UMovieSceneSection::SetRange (MovieSceneSection.h:333) when the secti ...
Sequencer: Expansion State of Animation Track Properties is not saved
UE - Anim - Sequencer - May 26, 2026The expansion state of Animation Track properties is only saved when Section > Advanced is expanded or collapsed.` ...
AutoSize triggers ensure on shortened Skel Anim Section moved past anim length
UE - Anim - Sequencer - May 26, 2026In Sequencer, calling "Edit > Auto Size" on a UMovieSceneSkeletalAnimationSection triggers the LowerBound > UpperBound ensure in UMovieSceneSection::SetRange (MovieSceneSection.h:333) when the secti ...
Visibility track key value is no longer the inversion of the bound bHidden property
UE - Anim - Sequencer - May 13, 2026Regression introduced in UE 5.7. Works correctly in UE 5.6. Up to UE 5.6, the bool value written to the Visibility track's BoolCurve was the inversion of the underlying bound property (e.g. AActor: ...
Control Rig + Animation in Sequencer Can Lead to Unexpected Slider Reset
UE - Anim - Sequencer - Mar 30, 2026When a character has both a Control Rig track and an Animation track, interacting with any slider in Sequencer can be interrupted. ...
"Allow Sequencer Edits Only" and Control Rig performance impact
UE - Anim - Sequencer - Mar 27, 2026We noticed an issue working in sequencer with "Allow Seqeuncer Edits Only" and control rigs. Performance will drop when manipulating using the AnimDetails channel sliders. ...
Binding to a Post Process AnimBP in Sequencer Causes MovieScene to Run Every Phase Every Frame
UE - Anim - Sequencer - Mar 20, 2026When binding to a Post Process AnimBP in Sequencer causes MovieScene to run the Spawn and Instantiation phase every frame. The code here explicitly looks at the AnimInstance on the Skeletal Mesh C ...