Sometimes, when moving around on Minecraft, the land doesn't properly form (as shown in the screenshots), leaving a blue kind of area, with little white bits. A player can walk on the space as well as other mobs such as villagers, except that they do glitch out, doing this. A player can also walk on the space but it either traps them under the surface (if it's water), or it glitches them out like mobs. It happens rarely though and has only bugged out twice for me so far.
I looked around with 'glitched land' but everyone seemed to be talking about Elytra which is nothing to do with the glitches due to me not ever using one, in the world.
Along with the blue and white dots, it also shows caves and where lava and water flowing below the layers, are.
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I recognize this... when this happens I think it's a Chunk Load failure. Sometimes caused by RAM issues... sometimes buggered if I can figure out what causes it.

It could be a chunk load failure, but it's probably just a chunk rendering failure. It often happens to me in a newly opened world, or after suspending the game by minimizing the window to the taskbar. But for me, the moment I move it renders correctly and doesn't cause any problems with gameplay.
Can you verify whether this still happens on 1.2.9?

I can't say if it happens in 1.2.9, sorry, I haven't been on the new update yet. On the 1.2.8 version it was a very rare thing though, only happening twice so far. If it happens again on the new version, I will just report it as a bug again but it may be fixed by the new update.
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-19308.
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