error in loading chunks and there are no crafting of the ores converted into blocks

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Super Flat World Chunks Being Deleted - MCPE-140428

Impossibility of crafting - MCPE-139720 or MCPE-139345...

Please answer the questions @unknown by following this link .

If you can, indicate the steps for the playback.

I also want to inform you that no more than 1 bug should be posted in 1 report.