I hope not being the only with this issue but when i tried to play in xbox one no matter if it is Halo 3, The Master Chief Collection or Halo Reach sometimes not let me put the fourth player no matter if i change the controller the account or the user in local splitscreen or online the most times not let me, the game dont stop only not let me put the fourth player i tried to push A button but not let no matter the controller or the user has i said before, please i pray to this problem will be repaired sooner.