While getting to rank 10 in my class one of the final requirements is to kill "x" enemies without switching or reloading said gun. Well I have done this several times now and it's not being recognized. Maybe have some sort of indicator bar to allow the player to know their progress.
Same here, I've had issue with 3 of the classes. Everytime i supposed to kill a certain number of people either without reloading or being detected in doesn't count the kills.
I'm now stuck on finishing panther because of this issue.