This is also a parity issue since you can make no comparisons between two worlds with the same seed.
I noticed the same problem. The setting "large biomes" no longer seem to give the same world but bigger for the same seed compared to a normal world.
If we take the seed 1854367407555292247 for example.
In a normal world at -2050 -600, one would be in the middle of a large swamp.
On the same seed with large biomes at -8200 -2400 (-2050x4 -600x4), one would end up in an ocean surrounded by dark forest.
Ok, this appears to be a bug with optifine, so perhaps I shouldn't have brought it up here
I do, and testing again without it got rid of the problem. So apparently this issue is with optifine.
Redstone dust on top of glass or top slabs can not send a signal downwards even though it connects. It can however send a signal up. This is intended and not a bug.
I'm pretty sure the trades are random and that having the same booktrade twice is not a bug.
Villagers not losing their profession if they have been traded with is intended and thus not a bug.
What items were attempted to be smelted?
Same