Minecraft wiki entry for Development_versions, associated text: MC-137451 – Mobs heads rotate quickly when looking around.
MC-137961 – Regenerating terrain in unloaded chunks.
MC-138979 – Scaffolding switches quickly between entity and block when placed on some non-solid blocks.
MC-139255 – Cave ambient sounds are not playing.
MC-140387 – When the hills and floating Islands were generated, the village was destroyed.
MC-140936 – The tall grass in the plains village structures does not take the block it spawns on into consideration.
MC-142228 – Skylight shines through blocks.
MC-142729 – Puffed pufferfish with NoAI tag can shrink down.
MC-143112 – Duplicated files in village structure.
MC-143489 – Zombies and skeletons catch fire inside old structures.
MC-143591 – Spiders and cave spiders fly-climb.
MC-143699 – Trader llamas will not despawn.
MC-144798 – Barrels always try to set their open state to false.
MC-145031 – Crash while ticking barrel.
MC-146295 – Loom top texture is backwards.
MC-146538 – Eye position for riptiding player is incorrect.
MC-146800 – Villagers can make the discount number of unstackable item more than 1.
MC-146860 – Trading sometimes takes the full price instead of the discounted price when the player has the Hero of the Village effect.
MC-146919 – Drowned, fish and guardians are not spawning.
MC-147031 – When a zombie wakes up a villager, the bed tag is still on occupied (occupied: true).
MC-147056 – Zombie villagers spawned with a zombie village move very fast.
MC-147207 – hs_pid_error appears for no reason in snapshots.
MC-147227 – Shift-clicking an item out of the trading inventory instantly locks the trade.
MC-147240 – Villagers can trade arrows of luck.
MC-147268 – Villagers do not run away from ravagers, pillagers, vindicators, evokers, zombies, or husks.
MC-147270 – Player can still move at normal speed and sprint while sneaking in a 1.5-block-tall space.
MC-147274 – Villager 'Happy' and 'Angry' particles not showing, even when particles are on 'All'.
MC-147298 – An arrow facing down with 0 degrees on both the X and Z coordinates cannot be picked up and play a sound on loop.
MC-147560 – Mobs stop spawning over time if the render distance is less than 11.
MC-147642 – Narrator is toggled when typing in text fields.