Problem with button not registering properly on fs3 (obsf-30's)

Hey guys, I’ve modded my hori fs3 buttons with sanwa obsf-30’s, I have soldered the buttons onto the pcb board and all of the work except my square button, it sometimes registers, sometimes it registers really late and sometimes it doesn’t register at all. The connection seems decent, it’s pretty much the same as all the other working solders. Any ideas on why it doesn’t work properly or any things I should check/do?

Thanks in advance.

You should take pictures and post it for us to see.

My camera hasn’t got the quality to take a good pic for you guys to see :(, ill try replacing the connector with another button to see if it works. Ill use the r2 connecter