Minecraft wiki entry for Development_versions, associated text: MC-139257 – Server crash on reload when world border is modified.
MC-141301 – Illager patrols spawning on blocks mobs should not spawn on, such as slabs, carpets, stairs, etc.
MC-141961 – Multiple protection enchantments on a piece of armor
MC-142360 – Pillagers patrols can spawn pillagers on top of trees inside a leaf block.
MC-144107 – Miscalculation of camera position in windowed mode on Linux.
MC-144929 – When there is water above a water source, other water sources adjacent to the water source flow outwards.
MC-146433 – Double chest does not display custom name.
MC-148354 – Guardians require water to spawn from spawners.
MC-148600 – Zombie pigmen will spread their anger forever if they can continuously respawn.
MC-148986 – Low-tier enchants from level 30 standard enchanting setups.
MC-149207 – Water with blocks above will convert to flowing water for no reason.
MC-149877 – Baby foxes suffocate when jumping under blocks.
MC-150401 – Chickens suffocate if jumping while under a solid block.
MC-150954 – Pillager patrol spawning is off: they spawn too close to each other, in odd biomes, and too frequently.