Unreal Engine Issues
Unreal Engine Issues
[5.4+] World Partition Landscape Spline Meshes Builder - Source landscape splines are not properly removed/hidden
UE - World Creation - Worldbuilding Tools - HLOD - May 30, 2025LandscapeSplineActors and LandscapeSplineMeshesActors are not behaving as expected in 5.4 or 5.5. Testing in 5.4 the issue mostly seems to stem from issues with the Target Landscape -> Landscape Ac ...
Slow editor/PIE loading of UWorldPartitionHLODSourceActorsFromCell
UE - World Creation - Worldbuilding Tools - World Partition - Aug 22, 2025Loading UWorldPartitionHLODSourceActorsFromCell takes a lot of time in editor + PIE when it contains a lot of actors per UWorldPartitionHLODSourceActorsFromCell (between 2K and 2K actors). ...
EncompassesPoint always returns false on ANavMeshBoundsVolume due to missing BodyInstance
UE - AI - Aug 3, 2025When calling EncompassesPoint on an ANavMeshBoundsVolume, the method always returns false even if the target point is clearly within the visible volume bounds. This occurs because AVolume::Encompas ...
Leaving engine open for an extremely long time builds up memory usage, eventually crashing upon any activity
Tools - May 26, 2015Edit MattK: Not reproducible yet If the editor is open and used for a long period of time without being closed, it stores memory use. After building up a significant amount of resources building us ...
BuildEditorAndTools build graph script no longer produces working editor executable
UE - Foundation - Horde - BuildGraph - Dec 19, 2017It looks like the BuildEditorAndTools script is no longer copying the (pre-existing in perforce) files from //UE4/Dev-Core/Engine/Binaries/Win64/ to the output LocalBuilds directory, which means the ...
Crash with package version with SetActorLabel.
UE - Foundation - Core - Cooker - Apr 25, 2018Since SetActorLabel does not correspond to packages, cook wants errors or warnings. ...
Foliage is Offset When Streaming Existing Levels From World Composition
UE - World Creation - Worldbuilding Tools - Foliage - Jul 3, 2018Streaming an existing level that used World Composition places the landscapes in the correct spot, but any foliage tied to that landscape is placed on the landscape tile at 0,0 instead of its corres ...
Modulated Shadow doesn't work
UE - Platform - Mobile - Aug 7, 20204.22 is working On Mobile sometimes Modulated Shadow is useful for Cast custom color and value Shadows on Unlit objects(custom celshading for example) ...
Crash when reimporting skeletalmesh with metadata
UE - Editor - Content Pipeline - Import and Export - Jan 11, 2021Crash when we restore metadata after re-importing a skeletalmesh. ...
Oculus Quest Link with OpenXR fires action events multiple times when multiple action events are bound to the same key
UE - Platform - XR - Jul 14, 2021From a developer: If the same key is mapped to N action events all the mapped events fire N times. This issue only exists with the OpenXR plugin enabled and does not occur for any keyboard/mouse i ...