I have Master Chief Collection for the Xbox One and starting yesterday, I was unable to be matched with any other players when in the matchmaking lobby. Let’s say I select to play a game mode online (Team Slayer, for example) and then I’ll sit in the lobby by myself for an infinite amount of time. I see a “search for players” and “players found” message on the lobby screen, but I am never matched with anyone.
The last time I played it and it worked was on Thursday, the 21st