1.21.2

Enchantment Glint effect doesn't render on block entities

Flying into cobwebs with elytra behaves differently across game modes

Can't combine swords/tools/armor with Unbreakable tag in an anvil

Item cooldown resets when re-logging in singleplayer / re-connecting in multiplayer

Boats and rafts can ride minecarts

Illusioners appear stacked when first provoked

Skeletons and illusioners aren't looking up / down at their target while strafing

The back faces of cacti do not render

Cold underwater ruin partially generated on top of itself

Throwing Bottles o' Enchanting into a one block high ceiling causes XP to end up at the top

Floating snow can be used to x-ray underground

Certain mobs attack while the player is in creative or spectator mode

Fire can no longer be placed on hoppers

Can't get nitwits from breeding

Map sometimes shows "unknown map" when not in the player's inventory

Mobs riding entities use the speed of the entity they are riding on instead of their own speed

Villager spawn eggs never spawn nitwit villagers

Some items are held sideways in left hand

Enchantment glint is applied to models once for each texture layer

Fossils in the nether can spawn inside of nether fortresses and bastion remnants

Certain types of plants on farmland can be destroyed by placing other vegetation in its place

Default resource pack icon uses old grass block texture

Mobs spawn at a much higher than normal rate in Nether fortresses, especially in soul sand valleys

Honey bottles don't stack correctly

The word "blocks" within some "/locate" command feedback messages is always pluralized

Wither's rib cage is not in the center of its model

Ender Dragon can see players with Invisibility effect