Unreal Engine Issues
Unreal Engine Issues
Editor reports crashes and terminates for exceptions that would otherwise be cleared by structured exception handlers
UE - Foundation - Core - CrashReportClient - Jun 8, 2020In 4.25.1, I added a vectored exception handler to capture unhandled exceptions to the Editor process. This handler runs too soon. It doesn't let the structured exception handlers run first where ma ...
Stale VSM pages after HLOD transition
UE - Rendering - Graphics Features - Shadows - May 23, 2024Virtual Shadow Maps do not invalidate pages when HLODs replace meshes. This can lead to inconsistencies between the geometry and the shadows, which can cause artifacts as pages are invalidated. ...
Crash when saving after resetting Instanced array element via Property Matrix on placed actors
UE - Editor - Nov 21, 2025When an Actor Component contains an Instanced UObject array marked EditDefaultsOnly, adding a new element to the Blueprint defaults correctly updates the Blueprint and its own Property Matrix. Howev ...
Invalid access location compressing a BC6h texture in the editor
RAD - Oct 29, 2024Large texture crashes during Oodle compression with "-stompmalloc". It appears to be an internal Oodle error. Also tested on //UE5/Release-5.5/, CL: 37463908 ...
LIVE: Reflection Capture are not working with moveable directional light on mobile
UE - Graphics Features - Nov 3, 2014When a Directional Light is changed from static to movable, the materials in the level will appear dark. ...
'Set Playback Position' node fires Timeline event even if 'Fire Events' is set to false
UE - Gameplay - Apr 30, 2015'Set Playback Position' node fires Timeline event even if 'Fire Events' is set to false. User Description: Basically using the set playback position node to set a new time position for a timeline ...
Unable to use TWeakObjectPtrs for the optional Old value for a repnotify function
UE - Foundation - Cpp Tools - UnrealHeaderTool - Oct 8, 2018A user has reported that Unreal Header Tool fails to parse a rep notify function properly when the optional parameter for the Old value is populated with a TWeakObjectPointer. Example of errors:Sev ...
Crash Opening Editor with Vulkan - Fatal Error - RenderingThread.cpp
UE - Rendering - Architecture - RHI - Mar 15, 2019Editor crashes when opening to project browser on Linux. Fatal error: [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 819] Rendering thread exceptio ...
Replace with child on subtree of the NamedSlot is broken after reloading a widget.
UE - Editor - UI Systems - Apr 5, 2021"Replace with child" does not work well with the NamedSlot widget after reloading the widget blueprint in Contents Browser. ...
A Skeletal Mesh simulating physics that hits a Geometry Collection Actor with OneWayInteraction true, OneWayInteractionLevel 1, and is using Damage Propagation (default) will be accelerated so fast it immediately disappears by hitting the world limits
UE - Runtime - Simulation - Jan 20, 2025A Skeletal Mesh simulating physics that hits a Geometry Collection Actor with OneWayInteraction true, OneWayInteractionLevel 1, and is using Damage Propagation (default) will be accelerated so fast ...