Player and world data aren't autosaved in sync, causing item loss or duplication

Composter loot table does not affect bone meal drops.

Items get deleted when the player's inventory is refilled while using the recipe book.

Items get deleted when the player's inventory is overflowed as a server crashes at max tick time.

Items get deleted when the inventory is overflowed by using the recipe book to return items from a crafting table.

Mineshafts do not generate wooden floors to replace stairs when in open air.