Hey Tim,
the good news: as of 4.8.2 this issue vanished (I didn’t test with 4.8). So I can now destroy every MultiFBX I export!
the bad news: the reason why I wanted the new mesh to function didn’t fulfill its purpose.
I want to destroy the inner part of the door, and then be able to walk through the door frame. This didn’t work with my first Model (left) because the frame has a Convex Collider, there seem to be a backlogged feature request UE-6140 that won’t be implemented anytime soon. The problem with my workaround I attempted is that the inner part of the door needs a worldsupport to stick in the frame, but it turns out that the frame has to be static to act as world support and as such can’t be rotated anymore - which is bad for something like a door. My next attempt was to use my first Model (where the Frame is a part of the destructible mesh) and disable the collision of it once the inner part is destroyed. But it turns out I can’t change the collision of a destructible mesh on runtime.
Do you have any workaround for this?