Here are all the bugs i saw

1. Armor GUI - When getting damaged, armor gui gets buggy, and you can't take off your armor
2. Furnace - You can't place fuel in the furnace, and you can't get an item from the furnace.
3. Block IDs - Some items have their IDs incorrect.
4. Mob Audio - Some mobs don't have sound when slain (tested on a chicken)
5. Sensitivity - Sensitivity reverts back to default when logged back into MCPE
6. Passive Mobs - Passive mobs don't normally spawn (I switched from creative to survival)
7. Fire - The upper half of the fire is colored white (Or is it just me?)
8. Hotbar - On the 5th Hotbar there is a green flashing bar
9. Buckets - Buckets are deleted when you make cake ( Proof: Daniel Frisk's Twitter)