Java Edition 21w20a

Not to be confused with Java Edition 20w21a.

Minecraft 21w20a
Edition	Java Edition
Type	Snapshot
Release date	May 19, 2021
Snapshot for	1.17
Downloads	Client (.json) Server
Obfuscation maps	Client Server
Protocol version	0x4000001C
Data version	2715

21w20a is the twenty-second snapshot for Java Edition 1.17, released on May 19, 2021, which made tweaks and fix bugs.

Changes

Blocks

Rooted Dirt

• Tilling Rooted Dirt with a Hoe will now convert it into Dirt, and pop out a Hanging Roots item.

Mobs

Axolotl

• Axolotls will now only play dead when in water.

Llama

• Llamas no longer spit at players in peaceful mode.

World generation

Amethyst Geodes

• Actually made Geodes rarer this time.

General

Narrator

• GUI narration now includes position and usage of hovered or focused element.

Tags

• Added HasVisualFire NBT tag
  • Entities with this tag visually appear on fire, even if they are not actually on fire.

Fixes

70 issues fixed

From released versions before 1.17

• MC-610 – Grass / Flowers / Snow are placed incorrectly in newly created chunks.
• MC-102220 – Barrier Blocks are not shown when "Show Invisible Blocks" is selected in Save Structure Blocks.
• MC-149777 – Crash when loading world: java.util.ConcurrentModificationException when using Java 11 or above.
• MC-172304 – Piglins, piglin brutes, hoglins, zoglins and axolotls can attack their own teammates.
• MC-189535 – Catching a fish in a bucket on creative mode doesn't give player new bucket.
• MC-191338 – Name color for Minecart with Command Block is incorrect.
• MC-192591 – Name color for Structure Void is incorrect.
• MC-198200 – Crash when leaving out processors in a template pool: java.lang.IllegalArgumentException: bound must be positive.
• MC-220694 – Name color for knowledge book is incorrect.
• MC-223322 – Chorus flowers can be broken with projectiles in spawn protection.

From the 1.17 development versions

• MC-203712 – Amethyst Geodes cause floating water/lava to generate when intersecting water/lava caves/pools.
• MC-203867 – Amethyst geodes can overwrite bedrock.
• MC-204393 – Lava Cauldron emits redstone signal strength 1 instead of 3.
• MC-204902 – Dirt paths are no longer compatible with the programmer art resource pack.
• MC-205104 – Rideable mobs are not affected by powder snow's freezing effect while being ridden.
• MC-205120 – Freezing hearts aren't displayed properly in Programmer Art resource pack.
• MC-205250 – Amethyst geodes can generate in a stronghold and can potentially destroy the end portal frames.
• MC-205680 – minecraft:location_check predicate floating point imprecision.
• MC-206107 – Parrots sitting on shoulders do not freeze in powder snow.
• MC-206131 – Amethyst blocks are transparent / don't conduct Redstone.
• MC-206601 – Potion particles are showing when looking through spyglass.
• MC-206839 – Pointed dripstones cause extreme durability damage to helmets.
• MC-207324 – Mobs and particles sometimes don't fully render behind stained or tinted glass.
• MC-207366 – Trying to modify the world height of a world after it's already been generated gives a null pointer exception.
• MC-208586 – Axolotls get stuck and spin constantly on top of lily pads.
• MC-208589 – Axolotls have a swimming animation (move their body up- and downwards) when on land.
• MC-208601 – Axolotls do not avoid lava when pathfinding.
• MC-208617 – Axolotls sometimes twitch rapidly when adjusting their rotation.
• MC-208641 – Axolotl movement glitch on stairs.
• MC-208649 – Breeding axolotl with a bucket of tropical gives back a bucket instead of a water bucket.
• MC-208654 – Collecting an axolotl with a water bucket in creative mode replaces the original bucket.
• MC-208675 – Axolotls sometimes use walking animation when in shallow water.
• MC-208682 – Axolotls frequently get stuck inside of waterlogged blocks.
• MC-208691 – Axolotls play dead even when they take damage without being attacked by an entity.
• MC-208735 – Axolotls attempt to pathfind towards unreachable water, then start spinning, eventually drying out and dying.
• MC-209324 – Pointed Dripstone can be broken with tridents in spawn protection.
• MC-212125 – Only one glow lichen drops when using shears on multiple in a single block space.
• MC-212531 – Shulkers can rotate their heads up and down.
• MC-212931 – Fire extinguishing sound doesn't play when mobs are extinguished with rain/water.
• MC-214041 – Mob can't properly or difficult walk on big dripleaf, when the big dripleaf is 4 blocks or more from the ground.
• MC-214909 – Top half of a small dripleaf can turn into a ghost block when placing it in water while the water is being removed.
• MC-215665 – Amethyst Geodes can overlap with dungeons.
• MC-216214 – netherrack_replace_blobs with water as target crashes the game.
• MC-216980 – Comma splices in two source strings (EN_US).
• MC-217113 – Foxes spawned inside of powder snow sleeps.
• MC-217608 – The big dripleaf texture is not vertically centered.
• MC-217742 – Campfires and TNT can be lit by players using arrows shot from flame bows in spawn protection.
• MC-219856 – F3 + L isn't sorted alphabetically in the debug screen.
• MC-219870 – The Mojang loading screen upon start up flashes black.
• MC-220063 – Sweet berries and glow berries sound events are named extremely differently.
• MC-220128 – Parity Issue: Rooted dirt won't turn into the dirt and drop roots item after tilling with hoe in Java.
• MC-220867 – Fossils can generate through bedrock.
• MC-221566 – Name color for light is incorrect.
• MC-221694 – Strays do not spawn in powder snow.
• MC-221833 – Light blocks are not shown within structure block bounds with Show Invisible Blocks on.
• MC-221863 – Powder Snow can be broken by players on fire in spawn protection.
• MC-221984 – Collecting an axolotl in a bucket and then placing it resets its kill cooldown.
• MC-222002 – Light item displays the wrong level number.
• MC-222116 – Splash water bottles doesn't extinguish candle cakes.
• MC-222797 – Axolotl can be bred with just tropical fish items, not just bucket ones.
• MC-223372 – You can decrease the level of a water or powder snow cauldron, through the use of an entity on fire in spawn protection.
• MC-224320 – minecraft.used:minecraft.potion doesn't increase when filling a partially filled cauldron with a water bottle.
• MC-224322 – Powder snow can create ghost blocks in creative mode.
• MC-224480 – Powder snow doesn't melt into water in cauldrons.
• MC-224482 – Superflat presets no longer generate with decorations.
• MC-225078 – Upgrading from 1.12.2 and below will cause items to lose enchantments.
• MC-225253 – Dying in a nether portal softlocks the player on the "You Died!" menu.

From the previous development version

• MC-225347 – cave_vines_plant isn't in #bee_growables.
• MC-225352 – Geodes have not been made "significantly rarer".
• MC-225360 – Cannot resolve SRV records: unknown host.