Challenge Reset

I finished the challenge "Get kills within 10 metres with the Assault Class". Ot polped up on the screen and then after the round was over, it went back down to 8/50 kills.

After I completed the challenge, I also got to rank 10 in the same round. Maybe that is what caused the issue?

Can you please fix this on my account so I don't have to do it again?

Thanks, Holzberg117