Minecarts start bumping when going downwards fast

Minecart appears in front of you (in first person view) when going downwards

Striped wolves only spawn rarely and only in packs of 2

Armadillo peeks out of shell while being attacked

Rails not in redstone tab in the recipe book

Slimes spawning inside walls and suffocating in Trial Chambers

Deepslate, gravel, and ores can generate within trial chamber hallways

Trial Chamber door leads to nothing/a stone wall

Campfire smoke doesn't go through Copper Grate

Decorated pot plays animation when right clicked with empty hand

Arrows can break infinite decorated pots when falling downwards even when they should have no velocity

Ghast fireballs cannot break decorated pots

Mob doesn't move/pathfind closer to the fence to hit the player, even if they would be able to hit the player if they did

Villager continuously walking and spinning on top of a cobblestone wall

You can use leads on Dolphins and Polar Bears which is inconsistent

Bottom of some blocks render weirdly in water

Ladders aren't attached to blocks properly, they float in front of them

Enderman automatically re-aggros just by being in their line of sight

Some mobs such as Zombies look away after each time they hit you

Endermen don't often teleport instantly when they fall into water

Spider / Skeleton Jockey is sitting "inside" of the spider

Strange river biome generation

Water ponds can generate floating with nothing under them

Weird floating water generation

Wooden Mineshaft platforms generating in and near lava pools and setting on fire, causing lag

Abandoned mineshafts can have weird generation

Enderman growl sound doesn't move with the player, only plays in the location it was triggered at

Baby Foxes drown just below the surface of water

Turtle's limbs spasm out when hit

There's a gap between wall signs and the block it's connected to

Iron Golem's legs and arms swing too much when pushed

Mojang Bug Tracker doesn't let report 20w13a, instead forces to use nonexistent version 20w13b

Blocks flickering when placing them from off-hand

Iron golem doesn't make hurt sounds

Arrow entities have black squares around them

Held items and dropped items glow in the dark

Enderman keeps following the player after becoming neutral/passive

Endermen turn hostile if you hit them in creative and then switch to survival

Baby Zombies stop attacking once in a while, and when the player is still

Pillagers don't ever look away from the player in Creative mode