Yeah, it’s a known issue, basically setting level transform in the blueprints does not work in PIE. Editor assumes that loaded sub-levels are already been transformed, so he does not need to apply transformation again when duplicating sub-levels for PIE session. We will look into fixing it, as a workaround you can PIE as standalone game, in this case blueprint transformations will work, because game will actually load sub-levels instead of duplicating them from editor world.