Going into operator/drifter used to make all the ammo boxes fall to the ground and stop the madness, but i don't know if that still works (haven't had this bug in a while, and if i had it was very minor for me to notice).
Oh and you need to go to far away corner to bring the ammo boxes to a far away corner then go into operator/drifter an get far away from the ammo boxes and then back to your frame in order for this to work. Again, i dont know if it still works, but it's worth a try.