I copy a saved game. I either play in the original copy or the copied copy and the next day, the game is missing from the list of available games to select from. The same session of play the game will show on the list but the next day (next session? haven't tested) the game is gone.

This didn't happen when the game minecraft better together was first released for xbox one but then after an update it started and the last two updates have not fixed it.