Blender to Unreal, Meshes import partially destroyed

Hey guys!

Awesome this topic, because I tried hard to debug this problem for longtime (5-6 Days) until found this topic. I’ll try to see if that works on my blender file but I hope. I’ll keep you inform.
I’m a beginner on blender and unreal, and I couldn’t find good tutorials where they explain that. That should be done because it’s so essential when you want to make a building or others.

Kind regards,

JB.