After Nether update, all named animals have lost their names.

After Nether update, all coral blocks in chests have changed to written books.

After Nether update, all coral fans in chests have changed to emeralds.

After Nether update, all stone slabs in chests have changed to name tags.

After Nether update, all stripped jungle logs in chests have changed to arrows.

After Nether update, all kelp bocks in chests have changed to poisonous potatoes.

After Nether update, all bamboo in chests have changed to gold horse armour.