I am having the same issue. Every time I save and open project strange cross x pattern (displayed above). I just update to 5.3.0 and still same issue…
What I found strange, is no matter what version of unreal it seems to not want to load point cloud file (.pts). the engine just freezes. However if I change RHI to driectx11 it works… or at least loads. but still the issue of it displaying all weird.
any solution would be great!