Challenges not completing during 2XP

I've been saving up some challenges for when double xp rolled around so I could get bonus xp for what is normally a simple task. Most are perk and accessory challenges. However, I've played 3 games where I've unlocked all the challenges I've been holding on to but when the match ends, I don't get any after match stats and all my challenges are still not completed. I'm not getting the xp that I should and the challenges seem forever locked. Has this happened to anyone else? Advice is welcome. Thanks.