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Mobs can escape enclosures and sometimes suffocate through walls.

Levers, Signs, Item Frames, Ladders, Paintings, Torches, and Redstone torches drop if connected to a block in a different chunk

World chunk generation/rendering is slow and extremely laggy at times.

Active redstone signals are not restored properly on world load

Entities can load before the chunk & corrupt a world

Each rendered chunk makes the game start to have a lot of lag for few seconds

Heightmap min value not set when loading chunk from NBT

Areas in shadow, even adjacent to light sources take considerable time to light.

When the new chunks are loading the client create huge lag spikes in singleplayer.( when loading 5-20 FPS, when loaded back to normal 50-60 fps.)

Beds that span a chunk border can partially break or become invisible during chunk loading

Chunks Charge Slow in 1.13.1

Dying causes you to respawn in empty unplayable world until relog

Flowing water is visible on random blocks before chunks generate

World not loading chunks at all when reconnecting, change dimension and exploring

Chunk doesn't loaded when player is approaching

Chunks unloaded do not reload afterwards

when underground chunks don't load properly

Chunk loading in Realms extremely slow

There is no way to pre-generate all the lighting data on an existing world / --forceUpgrade doesn't fully upgrade

visual chunk loading

Redstone dust on chunk borders can lose ability to power block in adjacent chunk, when reloading an area

Entire Chunk Disappeared After I Rejoined Single Player World

Chunk werden Vertauscht

Functions break when making blocks while chunks are being generated

Leashed pets teleport to the player when reloaded

Cocoa pods on chunk borders can break when loading

Portals crossing chunk border only partially lit

Chunks loaded in different places