After playing for a few hours today I completed many challenges, and got the rewards for them. In PVP I completed a few challenges including all but one of the gold challenges. After a bit more play the one gold challenge I was missing AND about 3 or 4 other PVP challenges showed that they were maxed out, but didn’t unlock. I restarted the game hoping they would pop, but they were reset to zero. I then played a match to see if they were really zero, or if playing a match would put them back to the correct amount. It didn’t, they really had reset.
Just for claritys sake, my seasonal and PVE challenges were NOT reset at all they remained the same. Only my PVP challenges were affected.