You shouldn’t put your question in the answer field, making it a false answer status. But anyway, I’ve found the solution after a few weeks I submitted this request ticket.
The first thing that you need to see is the mesh size and the bone size to make sure it is huge enough for the engine to generate the capsule collision. If it still doesn’t work then you can create the physic collision asset from scratch but still, you have to make sure that the bones are scaled in the right size otherwise it won’t calculate correctly.
As a matter of fact, this problem is because of the bone size. Try this solution first and see what you got.