Every time I launch the game there is a 50% chance that when I start shooting, the animation and sound work for the first second, but then the animation, along with the sound stop. When this happens, my camera starts jittering when I try to look around or move. The shooting does still do damage to the enemies however, but I have close to no visual or auditory indication that my character is shooting. In rare cases the camera doesn't always jitter, but 99% of the time it does (when this bug happens).