Hi, I have black ops 3 been playing it for a couple of years now. I’m Prestige 10 lvl 50 and my multiplayer challenge completion is stuck on 37%. it says 41/50 hardened sentry kills, go into a game, get kills with one and come out the game it hasn’t registered. It’s kind of disappointing as I cannot make progress and unlock weapons. Cannot find anything online regarding this and also I’m not prepared to reset my account as I’m not a flat out gamer and it would take me months to get back to the level I am now. Please if anybody has any suggestions or solutions I would be grateful.