Falling Through World and Cheat Override and

(World Info: Created on PC, Always Survival, and infinite world) My Friend uses a android phone to play with me on Windows 10 Edition and its got 3 bugs. 1. He falls through the world when he digs down, and he glitches to the void and dies. 2. Somehow he has flight but cheats aren't allowed. I never turned them on and im host of the world. 3. He was able to jump higer than me and he had no effects. Eventually though the bugs Just kinda fixed themselves. anyways just look into it if you can