1. make a flat world .
2. Then spawn some of mobs .
3. fly far far away to sky .
4. then back to the mobs (the will be gone) .
Comments 5
As per MCPE-8080, this issue may need to be reopened.
Osama, were the mobs in question spawned via a spawn egg?
I think that what is happening to you is called despawning. Look it up on the mine craft wiki