Minecraft wiki entry for Development_versions, associated text: MC-64334 – Fire can be destroyed if given an item with CanDestroy tag for unbreakable block below (notably bedrock).
MC-91522 – Shulker rendering position desync and generates ghost shulker when destroying shulker-ridden boat or minecart.
MC-101364 – Mobs and players sometimes dismount vehicles in a dangerous place.
MC-111473 – Player activated fireworks do not count as a player kill.
MC-111475 – Fireworks cannot hurt invulnerable mobs when a player is in creative mode.
MC-111498 – Fireworks and water bottle damage do not make neutral mobs angry or hostile.
MC-111502 – Fireworks damage does not make passive mobs flee in panic.
MC-130906 – Dolphins are moving very fast when near a boat.
MC-131046 – Angry dolphins give players dolphin's grace.
MC-146824 – Ladders and tripwire hooks cannot be placed on the sides of redstone blocks, observers and target blocks.
MC-147496 – Dolphin tries to catch the boat of the non-player ride.
MC-147708 – Putting out fires is not considered mining a block, leading to strange effects.
MC-148836 – World search and world name text boxes aren't focused when entering menu anymore.
MC-152441 – Corner quartz stairs do not have the border on the back/bottom that a normal quartz stair would have.
MC-157208 – Enchanting tables can display a blank enchantment option for hoes.
MC-163655 – Fire cannot be targeted like other blocks.
MC-165518 – Village houses desert_temple_1 and plains_temple_4 have no floor at entrance.
MC-168319 – Fireworks sometimes don't explode when launched at the edge or under a block.
MC-168748 – Rapid cod spawning and despawning causing performance issues.
MC-169533 – Asymmetrical walls in snowy_cartographer_house_1.
MC-169715 – Misrotated block in snowy_small_house_3.
MC-169869 – Mooshroom uses incorrect texture in Programmer Art.
MC-170242 – Asymmetrical walls in taiga_medium_house_4.
MC-170470 – At snowy_library_1, the snow block is placed next to the window, which causes an ugly visual effect.