A few friends and I were trying to play split-screen multiplayer MCC last night and ran into a myriad of issues.
First, we had extreme difficulty getting all four people in a local lobby. Once three had pressed A to join the lobby, the fourth person (tried with a number of profiles and different controllers) would be unable to join th game (repeatedly pressing A). Once three people had signed in, it would often show anywhere from 1-3 extra slots saying “Press A to Join” (for a total of 5-7 “slots” in a local lobby), even though only 4 controllers were on and paired with the xbox.
After multiple hard reboots we would occasionally get the 4th player to join and be able to play a game, but once the game finished it would immediately give a “controller disconneted” error that could not be exited (even though all controllers were connected). Tried plugging in each individual controller to system with a cord, and no controller was able to exit the message.
We then tried to split the group on two xboxes in two different rooms. We were able to join the two lobbies at first, but after a game had the controller disconnect error, had to quit MCC and restart xbox. After restarting, we were unable to connect both lobbies at all.