MG Ammo Counter

My MG Ammo counter doesnt work properly. The Number of magazins left does work, but the White bars dont go away as the amount of ammo in the magazin goes down, it allways shows a full magazin.
I allready updated my drivers, turned it off and on again, reinstalled the game. It has never worked for me, it was allways broken, cince it was implemented.

I am aparently not the only one with the problem.