Yes, I am using the flag Form Extended Structure. And no, the wall is a single mesh, I just scaled it up a bit in UE4’s static mesh properties then I made it destructible within UE4 also.
And it is attached to the floor, the one with the brownish texture.
Is the form extended structure really bugged?
And if it is, is there any temporary alternative I can do?
Anyway, thanks for the response!