Obnoxiously enough, Black Ops Cold War managed to be a bitch, rendering weapon XP not work correctly. It appears that weapon XP tokens are in fact completely broken right now. Users reported that when activating a double weapon XP token, after the match the progress is actually reset. Unfortunately, this means that the tokens themselves are completely useless.
Players have noticed that even if they level a gun up using a token, this progress will reset to the regular amount after a match. To rub salt in the wound, It also appears that there will be no compensation given to players.
Have you also dealt with the same problem? Let us know in the comment section below!