Unreal Engine Issues
Unreal Engine Issues
[AI] Crash when gathering heightfield geometry on worker thread
UE - Runtime - Character - Jun 25, 2025From the body of the ticket: We aim to do as much of the work off the game thread as possible to avoid impacting frame rate. We've recently found a crash during collection of the geometry slices fr ...
Level editor viewports crash when deleting actors after a layout change
UE - Editor - Apr 18, 2022Reported by a customer while testing USD import. See additional URL ...
[AI] Crash while loading navmesh with async static mesh compilation enabled
UE - Runtime - Character - Jun 16, 2022I tried 10+ times but am unable to get this to reproduce locally. Licensee reports that this is a rare crash for them. ...
UMG - Drag/Drop crash on exit when dropping back onto an old slot.
UE - Editor - UI Systems - Jan 7, 2015When dragging and dropping a widget onto an old slot, it resulted in a crash on exit. ...
Clicking "Pause on Impact" with in the details of the InterpToMovement component will cause a crash
UE - Gameplay - Blueprint - Apr 30, 2015When checking the "Pause on Impact" check box within the details panel for the InterpToMovement component, the editor crashes ...
[CrashReport] Mac crash - libobjc.A.dylib!objc_retain() [UnknownFile]
UE - Platform - Apple - Nov 10, 2017This is a longstanding but low frequency Mac crash. User DescriptionsChanging camera shake values and testing in a new editor window Callstack from Log[2017.11.09-19.23.22:392][ 63]LogMaterial: Mi ...
Crash in FTickFunction::RegisterTickFunction
UE - Gameplay - Jan 31, 2017Per https://udn.unrealengine.com/questions/319627/uworldspawnactor-with-template-parameter-causes-cr.html ...
Switching raytracing console variable in runtime can crash engine.
UE - Graphics Features - Lumen - May 13, 2020Licensee reported that is caused by missing ECVF_RenderThreadSafe flag in these console variable definitions. r.RayTracing.Shadows r.RayTracing.AmbientOcclusion r.RayTracing.Reflections Here is a ...
Static lighting crash on 5.4 when using landscape with WPO
UE - Graphics Tools - Terrain - Landscape - May 22, 2024When static lighting is built for a landscape with "Use Material Position Offset in Static Lighting" enabled it causes an editor crash. Licensee mentioned it was likely caused by a commit for 5.4, C ...
Crash when IK Anim Node is used in post process blueprint.
UE - ACT Character - Retargeting - Nov 5, 2024If an IK Anim node is used in a post-process animation blueprint when that post-process blueprint is active in persona. It will crash attempting to get dynamically created goal components from an ac ...