My World is glitched

My world is always glitched, since i'm break a specific block, they don't drop particles and the block return, and when i'm try to place a block, it's disappears and my villagers is don't claiming their workstation and beds, and mobs walk too slow. how do i solve this problem?

At level 0, when using the fill command in creative it glitched in a similar way. We filled ~2 0 ~2 ~-2 0 ~-2 sealantern 0. The result was an area 5 wide, 10 tall, and 5 deep of sealantern that proceeded to shatter itself. None of the blocks remained, even if we manually placed them.

Also in the same world, once we get to the deepest level of bedrock I break the bottom two blocks and they automatically replace themselves.

The whole world is slow to generate. I don't know if it's the same glitch but like the original poster, broken blocks replace themselves and filled blocks won't stay. The game was too laggy and glitchy to grab a video or screenshot.

Thank you for your report!
We're tracking this issue in MCPE-149214, so this ticket is being resolved and linked as a duplicate.

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