When each player is playing multiplayer or Realms with a different skin, they go away from each other and then appear or return to Steve or Alex when the players approach each other. Bug conditions:

1. First, each player plays multiplayer or Realms with another skin other than Steve or Alex.
2.  Leave each other until the players are out of see.
3.  And will be displayed or returned to Steve or Alex as each other players approach. (Custom skins did not cause this bug.)