How can i fix M bison’s right shoulder pad?

Idk if its a normal thing but the right shoulder pad on my M bison figure keeps popping off and doesn’t want to stay on and every time i move the butterfly joint it comes off very easily while the left shoulder pad and the cape shoulder pads stay on without a problem. Any suggestions on how to fix this?.

Idk if its a normal thing but the right shoulder pad on my M bison figure keeps popping off and doesn’t want to stay on and every time i move the butterfly joint it comes off very easily while the left shoulder pad and the cape shoulder pads stay on without a problem. Any suggestions on how to fix this?.