Any random session a random number (from none to ALL 40-60 players) of players will be muted automatically with no action from the player.
Have confirmed this on 2 separate consoles with 2 separate Xbox profiles.
Very unfortunate in a game where speaking to another player can be difference between having a great experience vs turning into a hostile encounter where someone loses and as we all know, when you lose in DayZ you lose big. And that's exactly what so many of us love about this game!