Unreal Engine Issues
Unreal Engine Issues
Hide Bone in constructor does not update world instances
UE - Runtime - Animation - Nov 4, 2019Hiding bones during construction is not properly displayed by level instances placed at editor time. Note that setting 'Update animation in editor' on the mesh and re-running the constructor script ...
Components added in Blueprint that want initialisation are not maintained by RerunConstructionScripts
UE - Framework - Blueprint - Feb 14, 2024When a native component that wants initialisation is added to a Blueprint actor in the Blueprint editor, the initialisation state of this component will not be correctly preserved by RerunConstructi ...
Undo and ConstructionScript break the AttachChildren array
UE - Gameplay - Components - Nov 14, 2019Undo fills AttachChildren array with null by the undo serializer. After that, a construction script tries to remove child components from parent component's AttachChildren but it can't find its poi ...
An ensure is triggered when a StaticMesh is set inside a StaticMeshComponent on an actor, and another actor references the static mesh actor from two child actor components.
UE - Framework - Blueprint - Feb 5, 2025There is an issue when setting a Static Mesh inside a blueprint that it is referenced by another blueprint with more than one child actor. An ensure is triggered inside the engine, and there is a ...
Spline points cannot be selected on newly placed spline blueprints
UE - Editor - May 28, 2024Licensee reports a difference in behaviour in instanced blueprints containing SplineComponents from 5.3 to 5.4, with respect to whether a placed blueprint containing spline component instance can be ...
Properties of placed-in-map actor instances may not replicate if their default has been edited
UE - Networking - Mar 26, 2019If the default value of a replicated property is edited on an instance of a placed-in-map actor, then on the server is value is changed back to the default, a client who joins in progress after this ...
Cannot edit collision response details in SkeletalMesh components added via Blueprint.
UE - Gameplay - Blueprint - Aug 5, 2015If the mesh component is added in Blueprint (i.e. in the Blueprint editor and/or through Construction Script), then it's not possible to edit the collision response details for an instance of the co ...
Custom Primitive Data color widget not applying correctly to static mesh components in Blueprint editor.
UE - Rendering - Architecture - Materials - Jul 23, 2025Context Custom Primitive Data is used to store custom data in an index array that is accessible through Blueprint and code. This allows for variations across instances of the same mesh without needi ...
[5.6 bug] FbxImportUI settings physics_asset configuration appears to have no effect
UE - Editor - Content Pipeline - FBX - Oct 24, 2025My fbx import script that used to work in 5.4 stopped creating physics asset when ran in 5.6 i checked the api and doesnt seem like it has changed between the two versions. below is the fbx import s ...
Procedural Mesh generated on BeginPlay does not collide with sweep actors in a packaged game
UE - Gameplay - Nov 10, 2016If a Procedural Mesh is created on BeginPlay (at runtime) instead of in the Construction Script, collision with non-player objects does not register correctly in packaged or launched games. This wor ...