Disconnection after BR win / Challenge bug

Since yesterday, I've played a lot of BR matches. The ones I lose go on normally after they end (sometimes it gets stuck on finding the next match, but it's a just a question of quitting and playing again).

The last 4 matches I won, i got disconnected right after the "Victory" screen, just before entering the helicopter. Because of that, I don't think I get the completion bonuses of the match and the win to be logged.

Alongside all of that, the "BATTLE ROYALE TIER ONE OPERATOR" challenge is not functioning as well. I'm on lvl 3, but didn't get any of the rewards, and they all show as a black image in the challenge page.