Java Edition 24w20a

24w20a is the fourth snapshot for Java Edition 1.21, released on May 15, 2024,^[1] which fixes bugs.

Witch

• Now always drops 4–8 redstone dust on death.
  • This is to improve the viability of farms that utilize witch huts to obtain redstone dust.^[1]

Effects

• Improved player attribute and effect handling.
  • Custom set base attributes are now kept when respawning.
  • Active effects and modifiers are kept when changing dimension or winning the game.

Enchantments

• Wind Burst
  • Invalidates the fall damage protection of mace smash attacks once again, reverting the fix of MC-270687.^[2]

Pistons

• Changed sounds to lower their volume and attenuation.
  • This was done to address the old sounds being too harsh and loud when used in redstone contraptions.^[1]

Credits

• Have been updated.

Data pack

• The pack format version is now 44.

Custom structure

• dimension_padding jigsaw structure tag was changed.
  • Now it is an object with fields:
    • bottom: the vertical padding at the bottom of the dimension, non-negative integer.
    • top: the vertical padding at the top of the dimension, non-negative integer.
  • Can be written as a single non-negative integer instead to be applied to both top and bottom fields.
    • e.g. both dimension_padding: 10 or dimension_padding: { bottom: 10, top: 5 } are valid.
• Data-driven enchantment field weight now has an upper bound of 1024.
• Data-driven enchantment field max_level now has an upper bound of 255.
• New entity sub predicate movement_affected_by - optional location predicate.
  • When present, adds requirements on a block at most 0.5 blocks below the entity which can affect its movement.

49 issues fixed

From released versions before 1.21

• MC-6431 – Status effects are lost when returning to the Overworld from the exit End portal.
• MC-83590 – Armor attributes list can be too long.
• MC-101170 – Portal sound doesn't get played when returning from the End.
• MC-124177 – Teleporting to another dimension loses some client states.
• MC-137719 – The player's horizontal motion doesn't affect fired projectiles in certain situations.
• MC-179940 – Player's attributes reset back to default values upon respawning.
• MC-181604 – Exiting the End portal resets player attributes to their default values.
• MC-252361 – Obsidian platform in the End is off by a block from entering from the Nether compared to the Overworld.
• MC-255218 – Fly mode is disabled after teleporting from the End to the Overworld through the End portal.
• MC-267230 – Hangul fonts are rendered with missing pixels.
• MC-268113 – The minecraft:generic.scale attribute is desynchronized when the player leaves the End dimension via an End portal.
• MC-268370 – Japanese CJK variants use the same diacritic.
• MC-268598 – The "weight" of skeletons in swamp biomes is too high causing less bogged spawns.
• MC-269036 – Bogged do not drop mushrooms when sheared with doMobLoot false.
• MC-269147 – Shearing a bogged spawns mushrooms at the bogged's feet.
• MC-269574 – Client attribute values may desync from the server after leaving the End.
• MC-269951 – When the gamerule "doImmediateRespawn" is set to true, the Wind Charged, Oozing or Weaving effects don't function for players.
• MC-270052 – Blur levels below 10 % do not appear to actually work.
• MC-270301 – The Fire Protection enchantment applied to horse armor no longer decreases the duration of time the horse remains ablaze.
• MC-270539 – The Blast Protection enchantment, when applied to horse armor, no longer diminishes the knockback effect from explosions on horse.
• MC-270637 – maxEntityCramming set to 0 prevents slime spawning from Oozing effect.
• MC-270789 – Only mace smash attacks increment "Times Used" stat.
• MC-271034 – List entries in the Social interactions menu are rendered over the background.
• MC-271168 – Demo timer does not respect "Text Background" setting.
• MC-271244 – Auto-save text does not respect "Text Background" setting in accessibility settings.
• MC-271360 – Horse armor and wolf armor are deleted when used on an armor stand.
• MC-271414 – /damage command at position applies knockback in random direction.
• MC-271980 – Arrows/bee stingers stuck in players disappear when leaving the End.

From the 1.21 development versions

• MC-271462 – Buttons make the deactivation sound when pressed.
• MC-271468 – Game crashes with custom enchantment's "rotated_block_provider".
• MC-271532 – Mace only loses durability during smash attacks.
• MC-271533 – Throwing Channeling trident at mobs during thunderstorm in Survival no longer summons lightning.
• MC-271547 – The player can't immediately sprint jump into a 2 block ceiling when standing next to it since 24w18a.
• MC-271566 – Game crash on insufficient "ammo_use" amount.
• MC-271574 – Inlining a painting variant causes players to disconnect when receiving entity data.
• MC-271583 – Soul speed no longer works through partial blocks.
• MC-271629 – Channeling doesn't work/"post_attack" effect requires enchanted item to be in the mainhand.
• MC-271636 – Attempting to modify NBT of killer rabbit throws unexpected error.
• MC-271678 – damage_item enchantment entity effect doesn't break items.
• MC-271715 – Crash when the sum of enchantments' weights overflow.
• MC-271716 – Fraction value provider allows division by zero.
• MC-271803 – Custom enchantment with very large max level causes game to hang after opening Creative inventory.
• MC-271863 – Crafter recipe gets stuck on an item with a similar recipe.
• MC-271881 – Soul speed doesn't make soul particles.
• MC-271896 – Using ⇧ Shift+F3+I on a villager crashes the game.
• MC-271937 – Striking a villager with Channeling trident during thunderstorms doesn't grant the advancement "Very Very Frightening".

From the previous development version

• MC-271853 – Random "Failed to store chunk" error.
• MC-271854 – Trying to generate new chunks crashes the server.
• MC-271948 – Entering the Nether breaks the game.