Online Seasons mode – Opponent quits no win or points awarded (Xbox Series X)

Same issue here, and it's not a bug as far as i'm aware.  When a player leaves, the game has to disconnect as you can't play with yourself. And you must play the full match, so 90 minutes + Extra time for the win to register. The opponent (or yourself) cannot leave here and cause the issue as the server already counted the win (or loss, or draw). 

So it happens because the server HAS to do that, instead of awarding the forefeit victory.