DarkLexFirst

I don't remember any parameters is StartGamePacket that could affect this, but by default non-block ids are static.

I understood, and theoretically it should be, but in practice these IDs are still static. Just check what happens if I just switch "runtimeIds" of oak planks and log. And...

OK, now I know what you mean. But in fact it may still lead to artifacts like this one: The result of using required_item_list.json with and without fixes  ...