This game is never stable! I'm dropping my review to one star because I keep getting dropped from my roommates party. We're on the same Wi-Fi, I just refreshed my game pass ultimate, I was able to get on multiplayer. Then I joined my roommate's party, on the same Wi-Fi, and I would get dropped when I went to edit my classes. Finally I waited until we started a custom game with bots and edited my class there. We played Nuketown '84 holiday. After that game ended, we were in the lobby. My roommate was dropped from the party on my TV, and her TV showed our whole party. She started a game and I wasn't in it.
TLDR; I keep getting dropped from my roommate's party, even though we're on the same Wi-Fi.