Terrain bug

I am found terrain bug in position: (x ~ z position) (~ = y position) I am play on the world a reader bug. It is major bug.

I am using Minecraft pocket edition.

1. Dot chunk = ±30000000 ~ 30000000
2. Stripped chunk =±0 ~ 30000000, and ±30000000 ~ 0,
3. Can't be moving and only fly up and down = ±10000000 ~ 10000000
4. Abnormal moving by player = ±4000000 ~ 4000000
5. Suffocated in the wall and fell out the world = ±10000000 ~ 1000000
6. Many crashes in opening inventory in dot chunk
7. To teleporting in position ±7000000 ~ 7000000 i must use a Ender eye to moving player