World Bugs (3)

BUG 1:
When i loaded my world, i built a block and by building dissapeared, i flew into it (i was on creative mode) and that's when i found out it was still there. i destroyed what i flew into and the building became visable again.

BUG 2:
I turned on my phone this morning and all my worlds names were blank. i went into my files and they were all still had names, back on minecraft pe... names still gone!

BUG 3:
Items becoming invisable in creative inventory. when i click one of the empty boxes all the items become visable again, please fix this!