So in this case you haven't completed the challenges, but all your progress is correctly tracked.
So far this season I've just been manually tracking my challenges and stars from the lobby screen, and hopefully the fix for this rolls out soon.
It's a bit unintuitive, but for now just ignore the Match Summary screen.
@NikkiLeonhart In your case the 2 completed challenges weren't actually completed. We can't see them but I'd bet a million Legend Tokens they're NBR challenges, and when you go and check your weekly challenge tracker they're not actually completed.
@HauntedGhost506 Again, the challenges aren't actually being completed. NBR ones are the worst for this, almost all of them will either show massive negative progress, or show as completed when there's even the slightest bit of progress on that challenge in a match. Fortunately this is just a client-side problem and the actual progress is correctly tracked.
For the broken fake completion tracking we'll use a made-up challenge, say, 10 knocks in Arena. If you played 9 consecutive matches with a single knock each, you'd be told you completed that challenge 9 times. Then on the10th knock the challenge would complete and the progress would be properly applied.
Not all challenges are bugged, and some are affected in different ways, but this fake completion is the most visible and the biggest source of confusion right now.