Serious bugs

There's a bug in worlds above 90mb that changes a block that the player place in the world for another natural block, example: stone, dirt.

Another bug happens with the entity of falling sand and item that makes them unstable and takes a while to fall, same with throwed ender pearls.

The skins of the player randomly dissapear.

On local multiplayer there's a tremendous lag and the model of player stuck in one animation, the armor doesn't fit well and when the players die and respawn the model stucks too