AR fireing stuck on, Bug??

When on the sandbox-like map, I forgot the name, my AR sometimes sets to fully auto and it can’t stop firing until I change weapon, then it only fires the pistol once then I can’t fire again. It’s only on that level this happens. I obviously tried taking the controller out and in again, that sometimes works but sometimes doesn’t. I don’t know if it’s something to do with this bxb thing. I know my controls haven’t been sticking, so it can’t be them, they’re brand new, and it’s not because of having the mouse in at the same time as there’s nothing touching it/ no wires tangled/unported and the port is fine. Only the large sandbox-like map again.