Bedrock Edition Preview 1.21.40.20

Beta 1.21.40.20 (ChromeOS, Android) or Preview 1.21.40.20 (Windows, iOS, iPadOS, Xbox, PlayStation) is the first beta/Preview version for Bedrock Edition 1.21.40, released on September 4, 2024,^[1] which brings more parity with Java Edition, and fixes bugs.

Mushroom Block

• The all-sided pore mushroom block has been removed from the creative inventory.

Mushroom Stem

• mushroom_stem is now its own block and is no longer a variant of red_mushroom_block and brown_mushroom_block.
• Mushroom stems used on the composter have had their fill chance adjusted from 85% to 65%.

Heads

• The different data values for the skull ID have been split up into their own IDs.

Old ID	New ID
skull	skeleton_skull
	wither_skeleton_skull
	zombie_head
	player_head
	creeper_head
	dragon_head
	piglin_head

/effect

• Added infinite duration option to the command:
  • /effect <player: target> <effect: Effect> infinite [amplifier: int] [hideParticles: Boolean]
• Added specific effect removal option to the command:
  • /effect <player: target> clear <effect: Effect>

Realms

• Added a new Realm Event.

UI

• Added a new message to explain when a Marketplace Template is not available on a specific platform.

API

• BlockLiquidContainerComponents API (water, lava, potion, snow) has been replaced with BlockFluidContainerComponent.
• Moved isHardcore from beta to 1.15.0.

Commands

• Added new overloads for the /schedule command which allows you to clear a queued function:
  • /schedule clear <function name> - Clears all queued functions matching the given name.
  • /schedule on_area_loaded clear function <function name> - Clears all queued functions that are scheduled as on_area_load by name.
  • /schedule on_area_loaded clear tickingarea <tickingarea name> [function name] - Clears all queued functions that are scheduled as on_area_load by ticking area name (and optionally also checks function name too).

Components

• The restriction_type field has been added to the minecraft:home component, allowing to define how an entity is restricted to its home position:
  • Its values are:
    • none, which poses no restriction.
    • random_movement, which restricts randomized movement around the home position.
    • all_movement, which restricts any kind of movement around the home position.
  • The all_movement value is currently in [Beta] and is planned to be fully released at a later date.
  • Entities that have moved too far from their home will always be able to move closer to it if prompted.
  • The radius of the restriction is still specified with restriction_radius.
  • Entities with a format version prior to 1.21.40 will be upgraded to use the new field in a way that preserves their existing behavior.
• Added the minecraft:dimension_bound component, which prevents entities from changing dimension through portals.
  • In Vanilla content, this is used by the Ender Dragon, the fishing hook, and some projectiles.
• Added the minecraft:transient component, entities with this component will never be saved. In Vanilla content, this is currently used for the fishing hook.

Entity Components

• behavior.fire_at_target is no longer usable if it is missing a projectile definition and will now throw a content error if so.

Entity Event Responses

• Added the execute_event_on_home_block entity event response, which allows the entity to execute an event on the block at its home position:
  • The event field allows to specify the event to execute.
  • For this to work properly, the entity must have a minecraft:home component with a set home position.

General

• Made the following changes to minecraft:single_block_feature:
  • places_block now supports a list of weighted block specifiers.
  • New randomize_rotation property.
  • New may_not_attach_to placement conditions.
  • Added diagonal as a new option for may_attach_to conditions.
  • File format version increased to 1.21.40.

Molang

• Molang queries wing_flap_position and wing_flap_speed now work for the chicken.

Resource and Behavior Packs

• Built-in packs now include archive files for improved load performance on some platforms.

Stability and Performance

• Increased the size of biome ids in saved chunk data from 8 bit to 16 bit values.

Technical blocks

• Merged the separate and direct item form of the heads (item.skull).

These additions and changes are accessible by enabling the "Beta APIs", "Bundles", and "Creator Cameras: New Third Person Presets" experimental toggles.

Bundle

• When a Bundle is used in the hotbar, one group of items is emptied at a time instead of everything being emptied at once.

API

• Moved EntityBreathableComponent from beta to 1.15.0.
  • Moved breathesAir from beta to 1.15.0.
  • Moved breathesLava from beta to 1.15.0.
  • Moved breathesSolids from beta to 1.15.0.
  • Moved breathesWater from beta to 1.15.0.
  • Moved generatesBubbles from beta to 1.15.0.
  • Moved inhaleTime from beta to 1.15.0.
  • Moved suffocateTime from beta to 1.15.0.
  • Moved totalSupply from beta to 1.15.0.
  • Moved componentId from beta to 1.15.0.
  • Moved getBreatheBlocks() from beta to 1.15.0.
  • Moved getNonBreatheBlocks() from beta to 1.15.0.
• Moved class BlockLocationIterator from beta to 1.15.0.
• Moved class InvalidIteratorError from beta to 1.15.0.
• Moved property BlockVolumeBase.getBlockLocationIterator from beta to 1.15.0.
• Moved enum BlockVolumeIntersection from beta to 1.15.0.
• Moved class BlockVolume from beta to 1.15.0.
• Added the DyeableItemComponent to beta.

Cameras

• Added minecraft:camera_attach_to_player to minecraft:follow_orbit.
• Added align_target_and_camera_forward option to the camera preset behavior pack JSON which can be used when the third person camera preset experiment is enabled.
• 3rd person camera experiment - The radius property of the creator cameras is now constrained to a value between 0.1 and 100.
• Third person boom camera will now reset to the starting rotation values specified in json when the default parameter is passed in the camera command.
• Added the entity_offset parameter to the command.

Graphical

• Removed the dark aura around the moon in the Deferred Technical Preview.

47 issues fixed

From released versions before 1.21.40

• MCPE-28531 – Potion tooltips missing % sign on mobile.
• MCPE-49126 – No sound when placing cocoa beans.
• MCPE-57498 – Player body located wrong in pocket UI.
• MCPE-91187 – Piglins are attracted to powered rails.
• MCPE-103061 – Enchanted Golden Apple gives wrong effects.
• MCPE-103592 – Armor GUI still shows when almost broken armor breaks.
• MCPE-114752 – The message of death by thorns is wrong.
• MCPE-119761 – Chat messages overlap.
• MCPE-120971 – Delayed chunk, block, and sound loading.
• MCPE-121058 – Sound event for pillager is unused due to typo.
• MCPE-122488 – Polar bears killed by fire/lava does not drop cooked fish.
• MCPE-128393 – Beehives/nests work as furnace fuel.
• MCPE-131854 – Vines placed with /setblock are invisible.
• MCPE-150684 – Dyeing mobs has no sound.
• MCPE-151765 – Tamed wolves ignoring player while chasing skeletons and won't teleport back soon enough.
• MCPE-152134 – Spawn point cannot be set at night when monsters are nearby.
• MCPE-161140 – Item text moves up when pointing to entities, even when the old interact button is not there.
• MCPE-166008 – Icon ? do not connected with the UI button X in loom and smithing table menu.
• MCPE-167134 – Controller hints show in villager menu when turned off.
• MCPE-174398 – Pink Screen Glitch when opening Microsoft Live Account Login Menu.
• MCPE-177192 – The health bar and the hunger bar are not centered in Classic UI Profile on mobile.
• MCPE-177299 – Gamerule showrecipemessages is considered a Cheat.
• MCPE-178148 – [ScriptAPI] Invalid ModalFormData and ActionFormData never resolve the Promise.
• MCPE-179008 – Creeper doesn't drop a music disc when killed by bogged.
• MCPE-182876 – Action bars reappear when re-entering a world.
• MCPE-185268 – Air bubbles are not aligned with hunger bar in HUD.
• MCPE-185460 – Emptying a bundle into the ground doesn't play sound and animations.
• MCPE-185504 – When the Clear Hotbar option is enabled, "Take from Bundle" button clears hotbar.
• MCPE-185868 – Item Display Transforms break when using bone visibility.

Other

• Bundles now display the bar showing their fullness level when placed in the hotbar.
• Bundle tooltip placement now takes screen safe area into account.
• The "Swap" button hint is now shown when hovering an item over another item with a game controller.
• The "Place" button hint is now shown on all screens when holding an item on the cursor with a game controller.
• Wind Charges can't be hit and redirected shortly after throwing them.
• Players hitting the edge of the generated world will keep their velocity. Example: While flying with the elytra, the player will stay floating instead of looing all speed instantly.
• Wolves, cats, and parrots trying to catch up to their owner now seamlessly resume navigation after teleporting to them.
• Wolves, cats, and parrots now teleport to their owner when panicking and far enough away.
• Fixed a bug that would prevent activation of addon for a Realm via Marketplace.
• Fixed a bug where the close button subpanel in the stonecutter panel was empty instead of hidden while using controller.
• Bogged now drops poison arrows when killed by mobs tamed by a player.
• Fixed an issue which prevented the new 1.21.30 trade table format from loading in-game.
• Fixed method ItemStack.getComponents from returning components that are unsupported in the current @minecraft/server version.
• Fixed a bug where the tessellation of redstone dust does not match the powered state of the dust for the following blocks:
  • minecraft:*_slab
  • minecraft:chain
  • minecraft:chorus_flower
  • minecraft:chorus_plant
  • minecraft:farmland
  • minecraft:grass_path
  • minecraft:heavy_core
  • minecraft:jigsaw
  • minecraft:sea_lantern
  • minecraft:sniffer_egg
  • minecraft:structure_block
• Fixed a bug where extremely fast moving entities would cause the game to crash. Entities can now no longer move more than 16 blocks in a single tick. (For reference, an entity with Speed 255 will move ~11 blocks in a single tick.)
• Game will no longer crash when loading a world near an End city.
• Fixed an issue where rider_rotation_lock of minecraft:rideable had no effect when using the minecraft:follow_orbit camera.