So I hit 39 and got a primary weapon unlock token, before I could choose between the 3 remaining weapons the server started a new round. At the end of that round I was still 39 but had no token and none of the weapons were unlocked. I tried logging out and back in, restarting the game but nothing has restored my missing token, it simply vanished into thin air. Any ideas?

So I ranked up to 40 and got another token. Not sure if this is the one I lost or the another one though.