Unreal Engine Issues
Unreal Engine Issues
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Iris: CurrTimeMS in FReplicationReader::ResolveAndDispatchUnresolvedReferences saturates on ARM64, so unresolved handles never move to the cold cache
UE - Framework - NetworkingIn FReplicationReader::ResolveAndDispatchUnresolvedReferences, CurrTimeMS is computed as static_cast<uint32>(FPlatformTime::Seconds() * 1000.0...
Missing textures on FBX import
TM - InteroperabilityReported in SF [Link Removed] When importing some FBX files, the materials may be missing textures when using the Interchange importer. The a...
BundledPSOs crash in 5.8 when trying to load .spc file
UE - Rendering - RHIPOST LINK: https://forums.unrealengine.com/t/bundledpsos-crash-in-5-8-when-trying-to-load-spc-file/2746430 POST BODY:Summary Game packaging c...
Crash when CharacterMovementComponent's CapsuleTouched processes overlap with a GeometryCollectionComponent
UE - Runtime - CharacterPOST LINK: https://forums.unrealengine.com/t/crash-when-charactermovementcomponents-capsuletouched-processes-overlap-with-a-geometrycollection...
Editor crash (unhandled assert) when changing blend mode on a material assigned to a Nanite static mesh
UE - Rendering - Features - NanitePOST LINK: https://forums.unrealengine.com/t/editor-crash-unhandled-assert-when-changing-blend-mode-on-a-material-assigned-to-a-nanite-static-...
[UE 5.8][MediaViewer] Crash when switching Level Editor viewport type to Cinematic Viewport
UE - CAPT - Tools - Media ViewerPOST LINK: https://forums.unrealengine.com/t/ue-5-8-mediaviewer-crash-when-switching-level-editor-viewport-type-to-cinematic-viewport/2747407 ...
FFT bloom disappears for some kernel/viewport size combinations (survey grid sized for R instead of 2R)
UE - Rendering - FeaturesFFT bloom (convolution bloom) renders nothing for some combinations of kernel size, r.Bloom.ScreenPercentage and viewport sizes (e.g. 50% and ...
Substrate Adaptive GBuffer: HWRT Hit Lighting drops indirect lighting from lights with a Light Function (GI / Reflections)
UE - Rendering - Features - Shading ModelsThe Light Function variant of the hit lighting miss shader is compiled as the Light Function material, so MATERIAL_IS_SUBSTRATE=1. This makes ...
SKP import - Materials missing and incorrect when using Collapse all
TM - InteroperabilityReported in SF [Link Removed] When importing a .skp model into Twinmotion 2026.2 Preview as Geoemtry, using the Collapse all mode will cause ...
[PCG Mode] Tool actors spawned by PCG Editor Mode tools ignore the current level and are always created in the PersistentLevel
UE - Graphics Tools - PCG - Procedural ToolsSummary In a non-World-Partition map with streamed sublevels, PCG Editor Mode interactive tools (Draw Spline / SpacingTool, Area, Paint, Volume...