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Mobs can escape enclosures and sometimes suffocate through walls.

Mobs do not spawn at the heights 16, 32, 48, 64, 80... (Multiples of 16)

Item Duplication Glitch using Comparators - Dupe 1 block to 8 stacks

lighting error at heights Multiples of 16

Redstone Not Properly Updated Across Chunks

Certain biome specific plant distribution is completely based on chunks, causing patchy biome generation

Forests don't spawn trees near the positive edges, but overstretch bounds on the negative edges

Some rare biome "Oceans" occupy a chunk in the plains.(Need to open the debug screen)

The chunk is wrong and the village farm is cut,It also affects villagers' roads and villagers' farms

Chunks do not load if player is in the 0th or 15th block of a chunk underground

1.16 Fabric has stopped creating chunks

Chunk boundaries sometimes prevent trees from generating with snow.

Pistons crossing over the Z origin point extend inconsistently