A licensee is reporting that when he re-imports the heightmap he is using for Landscape (World Composition), the foliage already painted on the surface, moves or shifts its orientation and scale.
He wants to be able to lock the movement and scaling of the foliage when he re-imports a heightmap. This will allow the foliage that was specifically placed to keep their relative position and size.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-25735 in the post.