Collisions do not work when mesh is part of the blueprint

Hello. I have big problem with my blueprint. It is a “wheeled vehicle”. I am using one skeletal mesh for the base of the car, and few meshes for all parts of the car. Meshes have their own collisions, and their collisions works fine. Problem starts when I put those meshes to my “wheeled vehicle” blueprint. Some of them still have their collisions, some of them not. I set everything to “block all” in collision settings, but it does not work. What may cause this problem?