I don’t know if it is because it is in the vs bot arena, but I did the 3 stronghold matches, won them, but got no progress on the challenge, even though from what I saw, it does not need to be a PvP match to complete it.
I have the same problem man, but it’s for all weekly challenges like the stronghold one or get 25 kills. I tried restarting the game and challenge swapping and nothing worked, I’m starting to think I might need to reinstall the game now.