Unreal Engine Issues
Unreal Engine Issues
Crash when adding Actor Components to a Spawnable Actor in Sequencer while it is despawned
UE - Anim - Sequencer - Feb 26, 2026After migrating our project from UE 5.5 to 5.7, we are experiencing a consistent engine crash in the Sequencer. The crash occurs specifically when a user attempts to add a component to a Spawnable A ...
Crash caused by a race condition in Nanite::DispatchBasePass()
UE - Rendering - Graphics Features - Nanite - Feb 25, 2026Nanite::BuildShadingCommands() launches two asynchronous tasks: ShadingCommands.SetupTask ShadingCommands.BuildCommandsTask BuildCommandsTask is responsible for modifying ShadingCommands.Commands ...
Cluster Group Index Causes Incorrect Break Events in Geometry Collections
UE - Simulation - Physics - Destruction - Feb 25, 2026More details in this [Link Removed] ...
Unstable automation tests in "Standard Tests" list.
UE - Rendering - Architecture - Feb 20, 2026The two following automation tests found in the "Standard Tests" list hit exceptions & cause the editor to crash:System->Physics->Interface->BodyInstanceShaders->ShaderPreprocessor->BuiltInMacros ...
Precaching global shaders with r.PSOPrecache.GlobalShaders = 2 crashes on startup
UE - Rendering - Architecture - RHI - Feb 19, 2026A licensee has reported that they are trying to run a cooked project with r.PSOPrecache.GlobalShaders=2 and running into a crash. They believe the problem is in PrecacheComputePipelineStatesForGlob ...
OCIO + nDisplay not producing expected output in Disguise
UE - Virtual Production - Rendering - Color - Feb 19, 2026Based on [Link Removed] OCIO + nDisplay not producing expected output The issue is just that when using UE 5.6 or later the resulting colour looks off compared to what 5.5 and pevious versions wou ...
Cloth - Assertion failed: SimData->LODIndex != INDEX_NONE && SimData->LODIndex <= LOD when using the rewind debugger with multiple LODs cloth
UE - Simulation - Visual - Feb 19, 2026The LOD switching when the simulation is paused could still be causing problems when the simulation is paused while the LOD indexes are going up because there is no LOD Bias mappings by default. Se ...
The hierarchy of Actors in LevelInstances can break when using BPs as parent
UE - World Creation - Worldbuilding Tools - Level Instances - Feb 18, 2026The hierarchy of a LevelInstance actors (Outliner) will break when cooking. The source is the call to AActor::RerunConstructionScripts in FWorldPartitionLevelHelper::MoveExternalActorsToLevel. The ...
Issue during the CapturingScene phase when having Nanite mesh as source component for HLOD Generation
UE - World Creation - Worldbuilding Tools - Feb 17, 2026When generating the textures for Approximate HLOD layers, the Nantie geometry is very low resolution, resulting in the captured textures fitting the actual HLOD geometry poorly. This creates visual ...
Inconsistent VSM page behavior around the Dynamic Shadow Distance range
UE - Rendering - Graphics Features - Shadows - Feb 17, 2026When a sufficiently large object casts shadows near the Directional Light's Dynamic Shadow Distance range, the VSM pages are inconsistent in their shadowing - some will choose to shadow per-pixel, w ...