Unreal Engine Issues
Unreal Engine Issues
Check the status of an issue or Search for an existing issue.
[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...
[5.8] Cherry-pick CL 55798320: re-precache PSOs in ULandscapeComponent and UGroomComponent OnRegister (fixes bPSOPrecacheCalled ensure on re-register)
UE - Rendering - RHIIn 5.8, UPrimitiveComponent::OnUnregister resets FPSOPrecacheComponentData, which clears bPSOPrecacheCalled (regression from CL 48140040). ULa...
[Gauntlet] TestExecutor does not clean up or release devices when a test's StartTest returns false, causing device starvation or a deadlock with -NoTimeout
UE - QA - ToolingSummary When UnrealTestNode.StartTest returns false (or throws), TestExecutor.ExecuteTests moves the test straight to CompletedTests. It never ...
Distance field PrimitiveModifiedBounds grows unbounded when scene captures render with bDisableWorldRendering=true
UE - Rendering - FeaturesWhen UGameViewportClient::bDisableWorldRendering is true and the scene is rendered only through manually triggered scene captures, FDistanceFi...
Auto Size in Sequencer not working on MovieSceneSkeletalAnimationSection
UE - ACT Character - SequencerMy understanding of the Auto Size feature on sections in Sequencer is that I should be able to auto size a section based on its contents. For ...
Skeletal mesh LODs never stream up under SSAM: FSkeletalMeshSceneProxy caches ForceStreamedLOD and is never re-gathered
UE - Engine Scaling - StreamingUE 5.8, cooked build, SSAM enabled (s.StreamableAssets.UseSimpleStreamableAssetManager=1, required by FastGeo). Symptom: characters spawn at ...
Mutable Chaos Cloth breaks when culling mesh affects mesh sections with cloth
UE - Runtime - MutableEncountering an issue since we updated to UE5.8 where characters whose cloth mesh sections have vertices culled will cause mesh degradation in...
Deadlock in URigHierarchy
UE - ACT Character - Control RigWe are regularly hitting a deadlock on 5.8.3. We have one background worker evaluating an animation, holding the RigHierarchy's ElementsLock ...
UAbilityTask_SpawnActor::BeginSpawningActor may return true when SpawnedActor contains stale value
UE - Gameplay - Gameplay Ability SystemUAbilityTask_SpawnActor::BeginSpawningActor assumes the incoming AActor*& SpawnedActor parameter is nullptr if no actor was spawned, but it do...
Sequencer custom task scheduler hangs with more than 512 tasks (TDynamicSparseBitSet::IsBitSet and operator|=)
UE - ACT Character - SequencerWith Sequencer.CustomTaskScheduling enabled, a task graph with more than 512 tasks can hang FEntitySystemScheduler::ExecuteTasks. Reported by ...