Parity issue: /fillbiome command missing

Impossible to create custom worlds through JSON files

Player's deathTime stops increasing after a few seconds

/tp command (and possibly other commands) don't support exponent encoding, unlike in Java Edition

Sky color instantly changes when biome changes

/fill comand displays wrong amount of blocks in its output when filling with air and "destroy" fill mode

Frozen oceans generate with floating icebergs when the water level is too low

Third person view doesn't work beyond X/Z: 67,108,864