Lately my sanwa JLF in my HRAP 1b has been acting kinda weird. It will work great, then all of a sudden the right doesnt, then it works again, now the whole stick stops working, now its back to normal.
Its kinda got me perplexed. I havent opened it up just yet but am going to. I think its it could be a wiring problem (least i hope).
most likely you 5-pin connector is coming loose during gameplay. easiest thing to do is to open up your stick, unplug the connector & plug it back in. You can also secure it with something easy like a rubber band. If you stick is using barrier strips, the check those connections as well.