Unreal Engine Issues
Unreal Engine Issues
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Mutable COIs built from ChildCustomizableObjects are engine only but do not denote that in anyway.
UE - Anim - MutableWhen creating a Mutable setup with nested Child COs, COIs can result with Editor-Only references, which will cause the COI not appear in the b...
Notifies placed on the first frame of a montage using root motion don't fire
UE - Runtime - AnimationThis is a regression in 5.8 caused by 47265321. It's because we now perform the montage update and dispatch the queued notifies via Characte...
Root motion extraction fails on blendspaces with bShouldMatchSyncPhases set
UE - Runtime - AnimationThere’s a bug with the bShouldMatchSyncPhases codepath in UBlendSpace::TickAssetPlayer. That codepath calls ResetBlendSamples to give a deter...
Editor crashes when overriding Texture Collection in Material Instance
UE - Rendering - ArchitectureWhen a Material uses the DefaultTextureCollection and a Material Instance overrides it - or vice versa - the Editor will crash. Note: bindles...
Incorrect rendering result on some geometry and materials in grouped components in SKP imports
TM - InteroperabilityReported in SF [Link Removed] In Twinmotion 2026.1, when importing certain SKP files with grouped components, materials may render incorrectl...
Mover character no longer calls ProduceInput on server when the only client unpossesses it and disconnects
UE - Gameplay - Player Movement - MoverWhen a client disconnects/unpossesses a mover character, the character's Network Prediction Component will re-configure itself now that it doe...
LinkedAnimGraph of AnimBP is not applied to the character to which ForceCustomMode is applied in the sequencer after the sequencer playback is completed
UE - CAPT - Anim in EngineLinkedAnimGraph is not restored at the end of an AnimationSection with ForceCustomMode enabled. There is a problem with the order in which cus...
'Use focal length' checkbox resets on reopening file
FEvaluateActorReferenceChannels don't run on GameThread
UE - CAPT - SequencerWhen playing back sequences on a character that is bound users will sometimes run into an ensure from FEvaluateActorReferenceChannels....
Translucent meshes randomly flicker when using VSM
UE - Rendering - FeaturesFlickering can occur on translucent materials, usually in the distance when there is at least one directional light and when using VSM. Flick...