When you're in a party and want to leave a game that you won, you always have to confirm that you really want to leave due to the players in your party. In my opinion, that should get removed if the game ends, if you win the game and want to go back to the lobby, it should just bring you to the lobby instead of you having to confirm it.
It's actually pointless to confirm that you want to leave if you have already won the game.
It's actually pointless to confirm that you want to leave if you have already won the game.