Update 1.2.20.2

Beta build 2 for Update 1.2.20, with its changelog, was released on April 20, 2018.

Experimental Gameplay
Some Update Aquatic features are more unstable and are currently behind the Experimental Gameplay toggle.

'Use Experimental Gameplay' can be toggled in World Settings. These features may break your world so a copy of your world will be created with "[EX]" before the world name. This feature cannot be disabled once it is enabled for a world and any progress will not be saved to the original world.

Changes

 * Updated Dolphin model.
 * Dolphins now have sounds.
 * Added Pocket UI screens for Compound Creator, Element Constructor, Material Reducer, and Lab Table.
 * Updated textures for Nautilus Shell and Heart of the Sea.

Fixes

 * Fixed a crash that occurred when creating a world when the Education Edition toggle was enabled.
 * Fixed a crash that occurred when deleting a World or Resource Pack through the Storage screen.
 * Attempting to import Education Edition world files no longer resets worlds.
 * Reduced the delay when placing or destroying blocks.
 * Curse of Binding and Vanishing books can no longer be acquired by trading with a Librarian Villager.
 * All Chemistry items now appear in Creative inventory if Education Edition cheat is enabled.
 * Reduced the amount of Magma Blocks that generate in underwater ravines.
 * Bucket of Fish items now appear in the Creative Inventory.
 * Dolphins can successfully get back to water now.
 * Fixed several of the top crashed that occurred during gameplay.
 * Fixed some toggles and buttons staying highlighted in Settings when they shouldn't.
 * Fixed the crafting recipes of Prismarine Bricks and Dark Prismarine being switched.
 * Guardians will now attack Cod.
 * Guardians can no longer jump out of the water and suspend themselves in air while firing their beam.
 * Water can once again be removed with a bucket if there is a block above it.
 * The Paper Doll is no longer running on the main menu.
 * It is once again possible to fill an Empty Bucket using touch controls.
 * Water around chests in Ruins no longer appears if the Ruin generates above water.
 * Charging a Bow or Trident and switching items no longer causes blocks to not drop when broken.
 * Ravines once again generate correctly.
 * Crouching and flying up no longer causes the player to jump in Creative mode.