Unreal Engine Issues
Unreal Engine Issues
[AI] Crash when gathering heightfield geometry on worker thread
UE - AI - Navigation - 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 ...
TInstancedStruct used in native actor class loses reference to Instanced UObject after BP recompilation
UE - Framework - Blueprint Compiler - Jun 25, 2025When a TInstancedStruct contains a UObject marked with EditInlineNew and DefaultToInstanced, the reference is lost after compiling the Blueprint but only when the struct is part of a native Actor cl ...
p.NetShowCorrections debug capsules do not match character's orientation with custom gravity direction
UE - Gameplay - Player Movement - Jun 25, 2025This looks to be because the debug drawing uses FQuat:Identity for the capsules, rather than the character's orientation. ...
POST /v1/testdata API doesn't properly convert data to BSON
UE - Foundation - Horde - Server - Jun 24, 2025Post: { "jobId": "685b12ad6765a5c9fefad260", "stepId": "a991", "key": "output-otem-job2", "data": { "Type": "Simple Report", "TestName": "EditorClientBoot", "Descript ...
Niagara mesh particles invalidate lighting when "Cast Shadow" is enabled with Hardware Ray Tracing enabled
UE - Graphics Features - Lumen - Jun 24, 2025Lumen HWRT, combined with Niagara Mesh Renderer, can cause the Lumen Scene to be reset, resulting in a sudden change to indirect lighting. ...
GPU event descriptions are not properly formatted in Insight
UE - Foundation - Insights - Jun 24, 2025Context Unreal Insights displays Timing Insights that can include GPU timing information. Rendering code such as FDeferredShadingSceneRenderer::RenderPrePass() generate such events.Problem Certain f ...
FAnimMontageInstance::SetNextPositionWithEvents can trigger all notifies on a montage/sequence
UE - Anim - Runtime - Jun 24, 2025This issue happens when Sequencer loops a dynamic montage. FAnimMontageInstance::ForcedNextFromPosition is set to 0 and ForcedNextToPosition is effectively the delta time. However, FMontageSubStep ...
[AI] Spatially loaded objects in a WP map that are unloaded do not contribute to the navmesh when Build Paths is run
UE - AI - Navigation - Jun 23, 2025Using Build Paths does not create a navmesh that also includes any Actors or Objects that are unloaded and spatially loaded. The navigation system appears to load the world within the navigable boun ...
Eye Adaptation Inverse node does not work with volumetric materials
UE - Graphics Features - Jun 23, 2025The EyeAdaptionInverse node works differently for surface materials and volumetric materials. In surface materials, it allows to have a consistent glow during day and night time, however in a volume ...
Enabling bUpdateComponentTransformToRootBone in a GeometryCollectionComponent causes broken particles to appear in the wrong location
UE - Simulation - Physics - Destruction - Jun 22, 2025Enabling bUpdateComponentTransformToRootBone in a GeometryCollectionComponent causes broken particles to appear in the wrong location. When that flag is true, the moment the GeometryCollection (GC) ...