Just playing survival with a friend on Xbox Live, I'm on Android, he's on Windows 10.   And I minimize the game, unfold and then load Minecraft after it, the same world I can play, but just a yellow square blinks on half of the screen.   Blinking yellow and loading Minecraft animation.   This happens often when I just fold and unfold the game.  Approximately 3-4 times after these monipulations.