Minecraft wiki entry for Development_versions, associated text: MC-137935 – Skeletons do not shoot player when seeking shelter from sun.
MC-138114 – Chunk loading/generation is significantly slower than 1.13.2.
MC-139382 – Stonecutter does not cull the face below it.
MC-139446 – Sky light not recalculated when blocks placed in air with /fill command.
MC-141990 – Cartography table does not update when cloning maps.
MC-142548 – Lighting inside buildings too bright/patchy.
MC-144107 – Miscalculation of camera position in windowed mode on Linux with KDE.
MC-144111 – Foxes get stuck after pouncing.
MC-144114 – Foxes can walk/slide while sleeping.
MC-145944 – Villagers travel up water really quick.
MC-145952 – Iron golem and villagers can leave their village.
MC-146272 – Double screen bounce with new sneak/crouch changes.
MC-146978 – Hero of the Village effect obtained naturally makes the player give off particles.
MC-147305 – Player crouches with a delay.
MC-147363 – "Villager disagrees" sound is played twice when right-clicking a villager without trades.
MC-147387 – Ravagers with a passenger won't attack players and iron golems.
MC-147646 – Mobs will go to village centers and attack the air.
MC-147770 – Reduced speed while auto-crouching affects players in spectator mode.
MC-147772 – Horses can glitch when moving up blocks.
MC-147799 – Strange TNT behavior.
MC-147853 – Animals cannot get out of water.
MC-147884 – Can't unspectate shulkers.
MC-147897 – Riding entities down elevation deals damage on dismount (again).
MC-147913 – Shearing sheep does not use shears' durability.