Unreal Engine Issues
Unreal Engine Issues
Crash in FMediaPlayerBase::TickPlayer in Shipping builds
Media Framework - Jul 28, 2017A crash can occur in FMediaPlayerBase::TickPlayer in Shipping builds. This is because FMediaPlayerBase::NativePlayer is not a thread-safe shared pointer. The fix is to make it ESPMode::ThreadSafe. ...
PlacedEditorUtilityBase class no longer ticks in the editor
UE - Gameplay - May 30, 2018This is a regression as it is working as expected in 4.18. When using the class PlacedEditorUtilityBase to draw a debug sphere, it doesn't appear in the editor in 4.19 and 4.20. ...
Fbx re-import material issue on LOD 1 and more
UE - Editor - Content Pipeline - Import and Export - May 13, 2019When the material order of embedded fbx LOD change differently in LOD 0 and LOD 1, the LOD 1 is wrongly assign when re-importing. ...
Crash When Playing After Setting Size of Retainer Box to Minus
UE - Editor - UI Systems - Nov 25, 2019Retainer box has minus size occurs crash when PIE, standalone and package. Probably, we should add any codes for adjust size to 0 or more to URetainerBox::SynchronizeProperties(). ...
RetargetSource in AnimSeqeuence doesn't affect DDC key
UE - Anim - Runtime - Aug 4, 2020Retarget source doesn't affect DDC key, so it causes incorrect result. Changing the anim sequence DDC key generation to include it fixes this issue. ...
[Feature Request] Event triggering skipped in subsequences and shots
UE - Anim - Sequencer - Feb 11, 2021Events in subscenes can be skipped if playback skips over the end of the subscene before evaluating the event. ECS allows for determinism fences which can fix this issue. ...
InitializeAnimScriptInstance may only need to be called if the mesh actually changes when restoring state in Sequencer
UE - Anim - Sequencer - Sep 23, 2021The fix for FURY-149 reinitializes the anim bp whenever the animation section restores state, it may only be necessary to reinitialize it if the skeletal mesh changes. ...
The transform of a Virtual Bone can be changed in the Skeleton but isn't preserved
UE - Anim - Runtime - Jan 23, 2023This is not a regression. Tested in //UE5/Release-5.0 CL20979098 The transform of a Virtual Bone can be changed in the Skeleton but isn't preserved this has caused some confusion with users. ...
Large brush sizes causes hitching in Landscape Sculpt mode
UE - Graphics Tools - Terrain - Landscape - Jan 19, 2023In my case I used the erosion brush and smooth brushes. Not a regression checked in Version: 5.1.0-23058290+++UE5+Release-5.1 ...
AllowAsyncRenderThreadUpdatesEditorGameWorld/AllowAsyncRenderThreadUpdatesEditor CVars are off by default and unsafe in Niagara
UE - Niagara - Mar 4, 2025This user made a github pull request: [Link Removed] but it was auto rejected. I think that we can consider taking their fixes, but keeping it disabled by default. ...