Unreal Engine Issues

Instances of Blueprints implemented native interface cannot be assigned to interface variables

FInterfaceProperty::SerializeItem (and ImportText) attempt to determine if the passed in object implements the interface in question. They do this by calling GetInterfaceAddress, which tries to get ...

OSS Steam: SteamSocket listen connections do not work after poll group changes

In 4.27 the logic in SteamSocket.cpp which is part of the SteamSockets plugin was changed to use Poll Groups instead of a removed API function that checked all children of a listen socket. However,  ...

Native default subobjects nulled in child Blueprints on compile

From reporting UDN: "We had a weird issue with new components added in C++ not being instanced properly on non-direct Blueprint children. It seems to happen if loading of the parent BP is deferred ...

r.Tonemapper.Sharpen > 0 produces translucent artefacts on SceneCaptureComponentCube

PVRTC texture is sampled as white when the uv value is very close to 0

When the uv value is very close to 0 ( < 0.001 ), the boundary value of the PVRTC texture is sampled as white. please refer to attached images and sample project. problem goes away when changing th ...

Const Blueprint Implementable Events don't update if const is removed from the native declaration

Constness is not updated in overridden BlueprintImplementableEvents when the native declaration is made non-const.  ...

Assert when tracing animations with Linked Anim Graphs

An assert fires related to the node index for the linked animgraph node being the same as the node index for the root node in the linked anim graph. Can be worked around by commenting out the check ...

Undo/Redo can cause the gizmo to desync from a leaf-selected component

This is a regression from 4.27. This is happening because of the change to typed elements. UEditorEngine::PostUndo, when combined with the typed element changes causes the selection set to reorder ...

Packaging failed after create EditorUtilityBlueprint asset inherited EditorTutorial class

Whenever creating the EditorUtilityWidget asset with EditorTutorial as the parent class, the packaging will fail. If the tutorial is not launched the package will succeed. But launched, it will fail ...

PostProcess AnimBP of Skeletal Mesh set to Additional Meshs in AnimMontage is not evaluated

This issue does not evaluate PostProcessAnimBP for skeletal meshes set to additional meshes in AnimMontage[Image Removed] If I opened PostAnimBP directly and compiled it, it also played on AnimMont ...