Unreal Engine Issues
Unreal Engine Issues
Values for InitialOnly replicated arrays can fail to be captured in replay when removed and re-added between checkpoints
UE - Networking - Oct 2, 2025When the first checkpoint is recorded, the correct array properties will be captured in the LifetimeChangelist. When these array items are later removed and another property on the actor is changed, ...
Imported animation has one more frame than the original fbx
OLD - Anim - Jul 19, 2016In UE4.12, imported animation has one more frame than the expected frame number. AS_AN_StepAnim_Test.fbx is 60 frame long animation(starts at frame 0, ends at frame 60). When imported to UE4.12, it ...
UGameplayAbility::ConfirmTaskByInstanceName() has incorrect code comment
UE - Gameplay - Apr 22, 2020UGameplayAbility::ConfirmTaskByInstanceName() has an incorrect code comment that was copied and pasted from UGameplayAbility::CancelAbility(). The comment for UGameplayAbility::ConfirmTaskByInstance ...
Actor components added natively can be set to null on derived blueprints during blueprint compilation
UE - Gameplay - Blueprint Compiler - May 7, 2021A native default subobject can be nulled out during compilation of the owning class in derived Blueprints with circular dependencies. ...
'Max World Position Offset Displacement' causes culling issue on HISMC/foliage in 5.4
UE - Rendering - Architecture - Materials - Jul 9, 2024Foliage/hierarchical instanced static mesh components have issues with culling when their material's "Max World Position Offset Displacement" value is a higher amount, e.g. 100.0. ...
[Legacy][FBX] Animation curves are not added to the skeleton anymore
UE - Editor - Content Pipeline - FBX - Jan 17, 2025Inconsistent media texture new style output state across the engine
UE - Media Framework - Jun 20, 2023A simple search for `NewStyleOutput = true` will reveal the many instances where this flag is already forced on, including media plates and media bundles. This however means that we have incompatib ...
Crash in editor when audio is playing
UE - Platform - Apple - Jan 26, 2017This is a regression and does not occur on Windows ...
Niagara Mesh Renderer's ParticleColor is not reflected in raytraced reflections
UE - Graphics Features - Lumen - Jun 2, 2020Mesh's ParticleColor is not reflected in raytraced reflections Sprite Particles do not encounter this issue. ...
Inherited UserWidgets can't create animations that bind to widgets on their parent's WidgetTree
UE - Editor - UI Systems - UMG - Nov 7, 2022Animating an inherited widget from a child UserWidget class appears to work, but the bindings don't resolve properly and the animation is null at runtime. This workflow should either be supported, o ...