TE-S Joystick unreponsive direction

This just started happening today in spurts, and now it won’t even do it at all. It seems to do everything except for Jump-Forward. Neutral jump along forward(walking forward that is) are working fine. It’s just when I try to do them at once, it won’t respond. I’ve already taken it apart and checked wiring and everything is in place. Is this a piece malfunction where I need to buy a new one or can it be fixed?