Unreal Engine Issues
Unreal Engine Issues
(Regression) Risk of PostLoad() assert crash in all cooked, nativized builds with async load thread enabled.
UE - Gameplay - Blueprint - Oct 25, 2018This is a regression that was introduced by the fix for [Link Removed]. As a result, we can potentially hit an assert in a cooked, nativized build during async load of a non-nativized Blueprint CDO ...
Using both an Atmospheric and Exponential Height Fog will cause an issue rendering Translucency-based Materials
UE - Graphics Features - Jul 10, 2014Using both an Atmospheric and Exponential Height Fog will cause an issue rendering Translucency-based Materials. (See Screenshots below) IMPACT: Cannot use both Atmospheric Fog ...
Planar Reflections distorted if Separate Translucency Screen Percentage less than 100%
UE - Graphics Features - Aug 19, 2020Planar reflections with any value lower than 100 for SeparateTranslucencyScreenPercentage are skewed/distorted when moving the camera, not representing the correct image when the value is 100. ...
Collapsed Nodes do not move with their functions
UE - Gameplay - Blueprint - Apr 10, 2015When you create a function and collapse nodes within it, the collapsed nodes to not follow the function category switch. I also noticed that when you move the function around that has the collapsed ...
UE5.7 InterchangeGenericAssetPipeline -> MaterialPipeline are not using parent material for material creation on import, was working in UE5.6
UE - Editor - Content Pipeline - Import and Export - Nov 24, 2025Hi there, It feels like a bug that the interchange generic pipeline is not using user-selected parent material for asset import, since it was working back in UE5.6 then we upgrade the engine to 5.7 ...
Access Violation in delegatesignatureimpl.inl after HotReload
UE - Foundation - Core - Jan 27, 2017This is the third different callstack in an attempt to repro a HotReload crash I am experiencing. The other two are:[Link Removed]: Nullptr Ensure and crash after HotReloading[Link Removed]: Assert ...
Assert in EditorEngine.cpp after HotReload
UE - Foundation - Core - Jan 27, 2017This occurred when I tried to repro an ensure and crash the resulted in [Link Removed]. In the crash group on the Crashreport website I noticed that KimK had the same callstack as this one. She wrot ...
Nullptr Ensure and crash after HotReloading
UE - Foundation - Core - Jan 26, 2017Following my repro, I hit an ensure and crash. The two times I tried to repro after my first crash resulted in different call stacks. I'll comment the other Jiras once I have them in. One of my cra ...
Division by zero causing NaN/Inf on USkeletalMeshComponent::UpdateRigidBodyScaling() when setting scale to zero and back
UE - Runtime - Simulation - Feb 11, 2026Up to UE 5.5, skeletal mesh physics did not get updated when the component's scale changed. This was improved on January 2025 with CL 39190335, which addressed [Link Removed] ...
Skeletal mesh LODs never stream up under SSAM: FSkeletalMeshSceneProxy caches ForceStreamedLOD and is never re-gathered
UE - World Creation - Worldbuilding Tools - Jul 29, 2026UE 5.8, cooked build, SSAM enabled (s.StreamableAssets.UseSimpleStreamableAssetManager=1, required by FastGeo). Symptom: characters spawn at a crude LOD and can never stream up for the lifetime of ...