Same issue, seems to happen after i move while shooting with the VZ61 Skorpion, it starts by making me unable to walk correctly, like half inverts all my movements, the recoil is so bad my gun violently pulls sideways even at 40% when the starter gun at 5% doesn't even do that, and when it pulls its totally uncontrollable, so basicly i bought my self a new gun that cost me cash, tested it in the fire area and didnt have that issue, so i upgraded it 2x on the first 2 mods, and am nearly broke, over a weapon i cant even use....very nice start to playing the game to hit a bug that cost me nearly all my funds...