Challenges not counting progression.

I didn't notice any action (revives, kills, etc.) not being counted towards the progression, but I noticed the challenge progress display may be off often. There can be even a difference between the general challenges list and tracked challenges list, where the tracked challenge usually appeared to be up to date, but the very same challenge in the general list was behind. Even when the challenge was completed and properly disappeared from the tracked list, it was still hanging in the general list. It looks just like a client display issue with the progression still properly tracked in the backend to me.