Unreal Engine Issues
Unreal Engine Issues
IsLocalController returning incorrect value when PIE listen server travels back to standalone map
UE - Networking - Jun 11, 2025In this situation where the listen server travels back to a level without listening, IsLocalController can return the incorrect value. After the NetDriver has been shutdown and destroyed, the pawn a ...
"Move to Level" of Landscape Tool leads component scale mismatch
UE - Graphics Tools - Terrain - Landscape - Feb 12, 2026In UE 5.7.2, when moving a Landscape Component to a sub-level using Landscape Mode > Manage > Move to Level, the proxy transform is not synchronized with the root Landscape when the KeepWorldTransfo ...
Incorrect CRC hash for shared fragments with FInstancedStruct member
UE - Engine Scaling - Mass - Mar 30, 2026User has encountered an issue with shared fragments that contain a member variable of type FInstancedStruct. It appears that UE::StructUtils::GetStructInstanceCrc32() does not correctly compute the ...
SplineMeshComponent resources leak
UE - Rendering - Features - Aug 3, 2026A race condition occurs in the InitSplineVertexFactory_Internal }}function call, which is distributed across multiple threads. This causes {{FSplineMeshVertexFactory to be instantiated multiple time ...
Crash importing morph targets with animation and opening it in animation editor
UE - Graphics Features - Mar 31, 2017Lina encountered a crash when importing the attached FBX file with morph targets and animation, and then opening it in the animation editor. I was not able to reproduce this issue in QAGame (her re ...
Packaging with Code Editor plugin crashes and then fails to build
UE - Foundation - Cpp Tools - Plugin System - Jun 18, 2015Packaging with the [experimental] Code Editor plugin enabled causes a crash during the packaging process in 4.8 source. The crash does not kill the editor, project can recover by choosing for Window ...
"Set Animation Mode" creates multiple instances of the AnimBP
UE - Gameplay - Blueprint Editor - May 12, 2015Changing the Animation Mode repeatedly creates a new instance of the AnimBP being used every time you switch back to the Animation Blueprint mode. Example Project: [Link Removed] ...
Opening a Sprite that is already opened in Property Matrix closes the Property Matrix tab
Tools - Dec 22, 2014Opening a Sprite that is already opened in Property Matrix closes the Property Matrix tab. This is inconsistent with other asset types; tested with Textures, Materials, and Blueprints, and in each c ...
Crash when Listen Server Attempts ServerTravel in Play in New Editor Window
UE - Networking - Jun 9, 2015JamesG: New callstack on UDN thread points to UNetDriver::TickFlush Editor crashes if a listen server attempts to use the console command ServerTravel while in Play in a New Editor Window. CrashR ...
BP Struct's 'Bool variable' will reset back to it's default value on compile
UE - Gameplay - Blueprint - Mar 18, 2015BP Struct's 'Bool variable' will reset back to it's default value on compile. ...