Unreal Engine Issues
Unreal Engine Issues
Children of editor-only actors do not maintain correct transforms when placed inside level instances for PIE and cooked builds
UE - World Creation - Worldbuilding Tools - Level Instances - Oct 20, 2025We have found an issue where children of editor-only actors get wrong transforms in PIE and cooked builds when placed inside level instances. This affects both engine version 5.5 and 5.6. The issue ...
Inconsistent Nanite raster bin debug visualisation colors
UE - Graphics Features - Nanite - Oct 20, 2025The raster bin debug colors are not always consistent when a static mesh and spline mesh are present ...
[Interchange] FBX - Front Facing X-Axis and Flipped Bone Orientation During Animation
UE - Anim - Runtime - Oct 15, 2025Actors attached to a skeleton imported through a FBX file with the Front Facing X-Axis option enabled are flipped when the skeleton is animated. ...
Intermittent Content is Missing from Cook errors for objects with Niagara packages
UE - Niagara - Oct 15, 2025Intermittently when cooking large licensee projects, an error is reported at the end of the cook:LogCook: Error: Content is missing from cook. Source package referenced an object in target package b ...
Material Instance Platform Stats don't update when Material Layer parameters are changed
UE - Rendering - Architecture - Materials - Oct 14, 2025The instruction count appears to update properly if the whole asset editor is closed and reopened. ...
Extend Worldpartition Editor Grid Widget
UE - World Creation - Worldbuilding Tools - World Partition - Oct 14, 2025Licensees are looking into ways of adding visualizations to the editor worldpartition grid widget. In one example case, just adding some lines to show which parts of the wp minimap belong to which s ...
Smart Link inactive by default when NavLink is a ChildActor
UE - AI - Navigation - Oct 14, 2025When placing a NavLinkProxy in ChildActor, the link is not enabled by default. In this situation, setting SetSmartLinkEnabled to true does not establish the connection. You must first set it to fal ...
Lightmass CalculatePointShadowing regression in UE5.6
UE - Graphics Features - Oct 14, 2025There is a regression or change in the Build Lighting process when using Lightmass in Unreal Engine 5.6:When building lighting with Lightmass calling the CalculatePointShadowing function, the result ...
User-defined InstancedStaticMeshComponent subclass misbehave in SCS Editor
UE - Framework - Blueprint Editor - Oct 13, 2025Context Users can create InstancedStaticMeshComponent (ISMC) (blueprint) subclasses. Any ISMC class can be added to an actor blueprint. When a mesh is selected and transforms are added to the Insta ...