In an superflat world, the signs and item frames on some chunks will disappear.

Although MCPE-140428 has been repaired, some chunks in some parts of the world will still disappear.

Missing rightmost outline pixels on Sign when use §l for wide letters and glow ink sac

Strange formation in high mountains.

When y=0，there are only stone,water,lava and minerals underground.

When Y＜0, water and lava are slice.