Unreal Engine Issues
Unreal Engine Issues
5.6 Skeletal Meshes with Disabled Sections Flicker in Ray Tracing Scene
UE - Rendering - Graphics Features - Ray Tracing - Nov 7, 2025Skeletal meshes with disabled mesh sections will flicker in the Hardware Ray Tracing Scene. Also tested on //UE/Release-5.6, CL:45232827 ...
GAS: FActiveGameplayCueContainer::RemoveCue crash while iterating removals when consecutive Cue tags are conditionally added and the conditional effects removed in ascending order
UE - Gameplay - Gameplay Ability System - Nov 4, 2025When removing gameplay effects by tag, if the tag that is being removed has other tags that are dependent on it in a cyclical way an "array out of bounds ' error can be triggered. ...
[AI] Gaps between Nav Mesh tiles in World Partition map causing movement issues
UE - AI - Navigation - Nov 4, 2025Navmesh has seams between some tiles that are actual edges rather than previously found "gaps" where it was a debug rendering issue. Pathfinding does fail between these tiles to go straight across. ...
Deadlock in UAnimationSequencerDataModel::Evaluate where FScopeLock Lock(&EvaluationLock) blocks execution indefinitely
UE - Anim - Nov 4, 2025When both the Sequencer Editor and an Animation Curve Editor are open for the same animation asset, the editor freezes completely upon editing the curve. Analysis indicates that the freeze is caus ...
Static Mesh Contact Shadows still render when all LOD sections have Cast Shadows dissabled
UE - Rendering - Graphics Features - Oct 30, 2025When the cast shadow checkbox is disabled for all sections that make up a static mesh the main shadow is no longer rendered but the contact shadow does not respect the instruction to disable shadows ...
World-Space widgets don't cast whadows when using VSM
UE - Rendering - Graphics Features - Shadows - Oct 29, 2025When using Virtual Shadow Maps (VSM), widgets placed in world space do not cast any shadows. The same widgets correctly cast shadows when the Shadow Method is set to Shadow Maps instead of VSM. ...
Point Lights Invlidate Virtual Shadow Map Cache when at a distance from attenuation radius
UE - Rendering - Graphics Features - Oct 28, 2025When the camera is outside of a certain distance from a point lights attenuation radius the VSM of that point light stops caching shadow maps. This can also be reflected in the output from the 'r.S ...
TOptional value changes in parent BP don't propagate to loaded child BPs
UE - Editor - Workflow Systems - Oct 27, 2025Context TOptional<T> is a wrapping struct around a type, that lets the property have an set and unset state, in addition to the property's value when set. It is editor exposed: designers can open b ...
bStaticWhenNotMoveable in Lighting category instead of Physics
UE - Simulation - Gameplay - Oct 24, 2025"UPrimitiveComponent::bStaticWhenNotMoveable"'s category is set to Lighting, not Physics. This causes it to be hidden when lighting-related properties are hidden, even though it controls physics sta ...
Variant Manager: LevelVariantSets asset corruption after rename or duplicate
UE - Editor - Content Pipeline - Variants - Oct 24, 2025When renaming or duplicating a LevelVariantSets asset that contains a Director Blueprint, the internal DirectorClass reference becomes mismatched. Although the DirectorBlueprint pointer updates corr ...