I get disconnected every time I win a game

No matter what game mode in UT (I’ve had this happen in champs, squad battles and rush) every time i win a game i get some variant of a connection error message and it takes me back to the main menu with the win not counting. It doesn’t does this with a loss however. Any else having this issue? I’ve tried restarting my xbox, my game, my internet and uninstalling and reinstalling the whole game and nothing has worked. I don’t know what to do