I am playing on PS4 (user id: MadFlava) and experiencing the same bug but with 50 officer kills. I have 53 officer kills but the 50 officer kills award is locked and won't let me claim. All I did was exit to the main menu before the next game started and it caused it to lock me out of claiming the reward. This has to be one of the worst types of bugs in the game because you put so much time into finishing the challenge only for the game to not unlocked the item/award you work so hard to achieve. These are the types of bugs that just make you want to stop playing the game. EA/Dice please fix this ASAP.
.jpg){kind=link}