Unreal Engine Issues
Unreal Engine Issues
Crash Applying Multiple Anim Modifiers
UE - Runtime - Animation - Sep 5, 2021Fatal error: [Link Removed] [Line: 2516] Fatal error: [Link Removed] [Line: 2516]Objects have the same fully qualified name but different paths. New Object: MotionExtractorModifier /Game/Characters/ ...
During SIE (simulate) and ejected-PIE, modifying a map actor causes triggers RerunConstructionScript() which discards all runtime modifications to SCS components
zComponent - Archive - Sep 6, 2024When Simulating, or Playing-In-Editor and ejected, modifying an actor in the editor world causes the SIE/PIE runtime actor to recreate its blueprint added components via AActor::RerunConstructionScr ...
Editor crashes when an Animation Blueprint Template is compiled with 'Layered Blend Per Bone' node
UE - Runtime - Animation - Mar 17, 2022Editor crashes when an Animation Blueprint Template is compiled with 'Layered Blend Per Bone' node. ...
Copy-pasting an actor property that is a set of strings adds extra quotes and escapes
UE - Editor - Aug 24, 2025Copy-pasting an actor property that is a set of strings adds extra quotes and escapes. The licensee has reported: The problem doesn't happen for example for properties of types set of integers, nor ...
Crash when syncing a folder with source control that contains a level that utilizes Level Streaming
Tools - Dec 28, 2017A crash occurs when you attempt to run the sync command on a folder that contains a level that is using level streaming in the editor. This was tested with Perforce and Subversion. Have not tested ...
ListView crashes when GlobalInvalidation is enabled.
UE - AI Workflows - UI Systems - Slate - Jan 11, 2022Reverting to the fix in [Link Removed] Closed (CL#17788567) will avoid the crash. ...
Ensure thrown when applying a Linear Color User Exposed Variable in a Niagara Emitter
UE - Rendering - Architecture - Niagara - May 20, 2022This is a regression tested in //UE4/Release-4.27 CL18319896. Ensure thrown when applying a Linear Color User Exposed Variable in a Niagara Emitter. ...
Linux: Assertion at splash screen when trying to open UE4Editor
UE - Platform - Linux - Mar 21, 2017I ran into this while looking to verify [Link Removed] at CL 3355923. I logged the issue I was verifying the fix for last night and have not updated anything locally, so the "OpenGL 4.3 not supporte ...
The Geometry Collection Dataflow node CreateGeometryCollectionFromSources is breaking Material Assignment
UE - Runtime - Deformable - Jul 21, 2025The Geometry Collection Dataflow node CreateGeometryCollectionFromSources is breaking Material Assignment. As the licensee has pointed out, this previously worked in 5.5. The most probably cause fo ...
Crash when recombining Value Pin after swapping Target Wild Card pin from a Vector2D to a Vector on a Set By-Ref Var node
UE - Framework - Blueprint - Jul 18, 2022This is not a regression. Tested in //UE4/Release-4.27 CL18319896 Crash when recombining Value Pin after swapping Target Wild Card pin from a Vector2D to a Vector on a Set By-Ref Var node. ...