Unreal Engine Issues
Unreal Engine Issues
Crash when displaying lumencards on map with many objects
UE - Graphics Features - Lumen - Aug 1, 2025There is a thread conflict between FRDGBuilder execution in Background Worker and LumenVisualizer's LumenCard add/delete process. When lumen cards are displayed in a scene with many objects, a crash ...
Rect Light not rendered correctly when using Virtual Texture as source texture
UE - Graphics Features - Aug 14, 2025Licensees have reported that this issue occurs when rendering from the command line: Rectangular lights with virtual textures do not render when you run the "Render (Remote)" button in the Editor, a ...
Adding a key frame to the curve editor in UMG adds multiple keyframes
UE - Editor - UI Systems - May 6, 2015When Right clicking and selecting add key frame to an animation on the curve editor in UMG there appears to be multiple keys being added to the timeline. ...
Curve already exists warning appears when editing a curve name even when the name is not changed in Persona
OLD - Anim - Aug 4, 2016A warning is displayed when editing a curve name and not actually changing the name. This can be seen when renaming in both the Asset Curve Panel and the Anim Curves Window This now only seems to oc ...
Can perform infinite "double jumps" when JumpMaxHoldTime is greater than 0.
UE - Gameplay - Player Movement - Jun 3, 2016There's a bit of broken (or missing) logic in ACharacter that doesn't account for users having released the jump button. This is a well known issue, and there's even video's describing how users can ...
Code based BT task breaks after closing/reopening the editor
UE - AI - Sep 9, 2015A behavior tree task created in code will break in the editor behavior tree. The BTTask node shows as red and says that the class cannot be found. Node must be deleted and replaced to fix the erro ...
Normals Not Imported If Mesh Has A Morpher
UE - Editor - Content Pipeline - Import and Export - Sep 19, 2019If a mesh has 'Morpher' modifier on it (even disabled) normals won't be imported, the same meshes imported normals correctly once the morpher component is deleted. Found in 4.22 CL# 7053642, 4.23 C ...
Interfaces implemented and then removed from a parent BP still show a phantom reference from child BPs until they are recompiled and saved
UE - Gameplay - Blueprint Editor - Jul 15, 2020See repro steps. The phantom references can be fixed by recompiling the child BP and saving it. Note that just loading ChildBP2 does not fix/remove the reference during compile-on-load, so it's a ...
Crash when load the levelinstance what is set "LevelBehavior=Standalone" in the stanadalone game
UE - World Creation - Worldbuilding Tools - Level Instances - Jul 16, 2024A crash occurs when LevelInstance with LevelBehavior set to "Standalone" is loaded in a standalone game. Specifically, when LevelInstance is deleted by moving outside the loading range of the worldp ...
Move SAnimTimeline, SAnimTrackArea, and SAnimTrack to public API
UE - Anim - Runtime - Sep 14, 2025I wanted to be able to make use of the same widgets the AnimSequence uses for its timeline with play/pause, rewind, etc. However I discovered this was all in private folders in the Persona plugin. ...