This occured again for me during gun game. Basically as soon as gun game starts - f1 spectate yourself and you are basically a floating spectator with a gun.
It's worse if the person has a crowbar because they can kill you with a crowbar and it RESETS you back to gun # 1
Fixed, seams my previous fix didn't account for a respawn timer that failed to check your status correctly that you trigger by changing to spectator just before or during the round