This is for a 2016 22 SSRX. There are four, 2 front and 2 back corners and are fitted inside the square framing. Used to support the Bimini top by snapping into a bracket mounted on the railing. Made from injected molded plastic. They are not locking into place, keep slipping out and not supporting the top. Don’t look broken or worn, just won’t stay in place. Anyone familiar with this problem?