Wireframe/layout issue after importing from 3ds max

Hello. After a few imports, I noticed that on the wireframe map I see this (screenshot). that something is not right. It’s hard to navigate and drag meshes around when this mess disturb. I also noticed that if i import through the content browser, you get this mess, but if you import via File — import into level, then everything is as it should be on the layout. 3ds max 2018. Unreal Engine 4.20. If someone knows why this is happening, pls, answer. this would help me a lot. Maybe its a bug. maybe not.