Hello fellow MoI users.

I am having this very annoying problem with MoI models imported to 3DS Max.
Problem is that vertex normals (I guess) gets messed up immediately after I try to modify the geometry, like adding additional cut or whatever. How can I prevent this from happening or what would be the fix? Since I made some tests and in C4D it works just fine and, nothing gets broken.
Attached image will help you to understand better what I'm talking about.
Thank You very much.