Minecraft 1.21

Everything below is measured by comparing the game files of 1.20.6 with 1.21 — not copied from patch notes.

1.21 block and item additions

3 new blocks and items. Hover a slot for the name; click to open its page.

Items +3

Music Disc CreatorMusic Disc Creator Music BoxMusic Disc Precipice

Sound events +6 · −2

Removed: minecraft:block.trial_spawner.ambient_charged, minecraft:block.trial_spawner.charge_activate

New in-game text 111

Showing the first 80 of 111 new strings.

Reworded text 28

Wording Mojang changed in this version.

Read from Mojang’s own release notes for Minecraft: Java Edition 1.21, published 2024-06-13. Every entry keeps its original bug ID.

379 issues fixed, read from Mojang’s own patch notes. Each entry keeps its original bug ID.

Fixed bugs in 1.21 230

• MC-67 Entities with passengers cannot travel through portals
• MC-902 The end obsidian platform resets every time entities go through the end portal, which can cause blocks to be deleted
• MC-6431 Status effects are lost when returning to the overworld from the exit end portal
• MC-8983 Primed TNT cannot travel through nether portals
• MC-9568 Mobs suffocate / go through blocks when growing up near a solid block
• MC-9644 Launched falling_block entities do not travel through portals
• MC-14923 Players can be kicked for spamming in a singleplayer world with cheats disabled
• MC-16345 Reducing the player's base max health using /attribute does not always reduce their current health
• MC-26304 Brewing stands reset brew cycle when unloaded
• MC-31819 Hunger saturation depletes on peaceful difficulty
• MC-44280 Entities don't receive knockback from projectiles fired from dispensers
• MC-50612 Command blocks do not update when you place them near any source of power
• MC-59626 Arrows lose their Punch enchantment property when unloaded
• MC-76104 Guardians are unaffected by Thorns enchantment
• MC-78473 Mobs don't panic when hit with a summoned or dispensed potion of harming
• MC-83590 Armor attributes list can be too long
• MC-93669 The sweeping attack doesn't ignite other mobs when using the fire aspect enchantment
• MC-93833 Only if Health is provided maxHealth attribute is used as maximum Health value
• MC-96198 Boats / rafts move into blocks when landing in less than one block deep water
• MC-97087 Attributes won't work in main hand if they were in offhand
• MC-99411 Frost Walker ice only semi-affected by randomTickSpeed gamerule
• MC-101170 Portal sound doesn't get played when returning from End
• MC-110815 Slimes are summoned with the wrong amount of health
• MC-114566 Can't teleport back to the central island with End Gateway Portal on outer End islands
• MC-116279 Non-player entities going through Nether portal do not generate portal in Nether if none exists
• MC-116643 Silk Touch cannot be combined with Looting or Luck of the Sea
• MC-117361 Mob type specific damage enchantment (Smite, Bane of Arthropods) affects all nearby entities when hitting affected mob with Sweeping Edge
• MC-124177 Teleporting to another dimension loses some client states
• MC-131637 The slowness effect is applied to entities when the bane of arthropods enchantment is held in the off hand
• MC-136147 Riptide tridents use mainhand item to inflict damage when thrown in the offhand
• MC-137018 Killing rabbits with Looting and Fire Aspect only drops cooked rabbit sometimes
• MC-137719 The player's horizontal motion doesn't affect fired projectiles in certain situations
• MC-148741 Selection boxes in some screens are misaligned in comparison with their text
• MC-151648 Non-player entities cannot travel through unlinked nether portals
• MC-157215 Loading 2 crossbows with 1 arrow in the mainhand and offhand can cause the arrow in the hotbar/inventory to become a "ghost arrow"
• MC-158245 Fire Aspect enchantment from mobs can set you on fire even when blocking with a shield
• MC-160140 Shulker boxes on the obsidian platform are destroyed and do not drop when a player enters the End
• MC-166809 Cooldown rendering stutters while pausing
• MC-169698 Blocks within igloo basements can generate waterlogged when generating in close proximity to water
• MC-170103 Untamed wolves only beg for food while being angry and jumping
• MC-170907 Network position deltas are processed relative to a wrong point
• MC-172031 Throwing an ender pearl into a Nether or End portal often has no effect
• MC-175619 Dispenser drops honey bottle unless empty slot is available
• MC-175729 Walking on the edge of underwater soul soil with Depth Strider and Soul Speed doesn't show soul particles
• MC-177965 Putting on/taking off soul speed boots while standing on soul sand/soil does not properly give speed
• MC-178383 Horses, donkeys, mules and llamas spawned from spawn eggs or /summon command have 53 health
• 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-182606 When sneak-walking with Soul Speed on a Soul Sand or Soul Soil block (most noticeably) adjacent to lava, too many soul particles spawn
• MC-188693 FOV doesn't change back when riding a mob after staying on Soul Sand with Soul Speed
• MC-189365 Player can retain Soul Speed effect by bridging
• MC-191591 Saddles lose their NBT data when equipped on horses, zombie horses, skeleton horses, mules or donkeys via right-clicking
• MC-193343 Soul Speed effect remains after switching to spectator mode
• MC-195931 Incorrect amount of damage heart particles shown when hitting some entities for the first time
• MC-200899 Players don't receive thorns damage when attacking entities wearing thorns armor with indirect sweeping attacks
• MC-200991 Soul Speed in minecart uses durability
• MC-213349 Certain mobs that can melee can't use the Fire Aspect enchantment
• MC-215144 A re-created "Default" world has world type of "Custom"
• MC-223165 Snout banner pattern is treated as common loot
• MC-223301 Goats not taking damage when attacking with Thorns armor equipped
• MC-224743 Jumping on soul sand uses durability of Soul Speed boots
• MC-225312 Evokers using evoker fangs are not affected by the Thorns enchantment
• MC-225870 Breeding an axolotl in creative replaces the bucket of tropical fish
• MC-226894 Entering the end while in water depletes hunger
• MC-228598 Item count desync when firing an arrow while switching to a different hotbar slot
• MC-232770 Entities receive knockback from incorrect directions when being damaged by firework explosions
• MC-234162 The "minecraft:ui.button.click" sound isn't played when adjusting sliders if the mouse cursor is released while not being held over them
• MC-234880 Llama's unaffected by Thorns
• MC-237057 The "minecraft:particle.soul_escape" sound is very rarely heard by other players when using boots enchanted with soul speed
• MC-237063 Particles produced from using boots enchanted with soul speed are inconsistently displayed for other players
• MC-248272 Enchantment::doPostHurt and Enchantment::doPostAttack are called twice for players
• MC-252361 Obsidian platform in end is off by a block from entering from the nether compared to overworld
• MC-252691 Player spawns on a bedrock layer when the world is first created as a SuperFlat world with non-full blocks on the surface
• MC-252817 Placing a map into an item frame and removing it does not remove the green player marker
• MC-252846 Mobs can pass through fences with carpets on top when growing up
• MC-253209 Some mobs will no longer panic when receiving poison/wither damage
• MC-253457 Cats and Ocelots are immune to Thorns damage
• MC-253791 Frogs suffocating when growing
• MC-254004 Falling Block Entities do not process their End Gateway Cooldown Timer
• MC-255218 Fly mode is disabled after teleporting from the End to the Overworld through the end portal
• MC-258967 Entities receive knockback from splash potions based on the direction that the said entity was facing when throwing the potion
• MC-259811 Paintings with non-existent variant entity tag are falsely labeled as random variant
• MC-259987 Damage command only issues knockback if it was done by an entity
• MC-260346 Custom music discs cut off when vanilla disc would normally end
• MC-261701 Lag spike when opening creative inventory for first time in world
• MC-262469 The "Remote Getaway" advancement isn't granted upon traveling through end gateways while riding boats
• MC-265009 Explosion knockback reduction caused by Blast Protection does not stack with several enchanted armor pieces
• MC-265088 Onboarding Narrator button doesn't update upon pressing Ctrl+B
• MC-265583 Incorrect pluralization for skin customization strings for pants
• MC-265818 The "gamerule.doVinesSpread.description" string consists of grammatically incorrect word usage
• MC-266113 Copper doors are in the #minecraft:wooden_doors tag
• MC-266118 Copper doors are in the #minecraft:mineable/axe tag
• MC-266140 The "Open link" button within the realms menu is improperly capitalized
• MC-266290 Double doors do not automatically form between waxed and unwaxed copper doors, even of the same variant
• MC-266431 Trial chambers intersect with the bedrock layer
• MC-266471 Trial chambers can intersect aquifers, causing some blocks inside the structure to be waterlogged
• MC-266556 Trial spawner cannot be activated in peaceful difficulty
• MC-266586 Trial chambers can spawn directly inside the deep dark biome
• MC-266626 Breeze doesn't stop attacking the player when it enters on the same team
• MC-267050 Chat disabled strings are missing verbs
• MC-267071 The word "packs" within the "download.pack.failed" string is always pluralized
• MC-267154 Using an Eye of Ender plays the minecraft:entity.ender_eye.launch sound event twice
• MC-267230 Hangul fonts are rendered with missing pixels
• MC-267441 When a player's generic.step_height attribute is set to more than two, attempting to step atop of more than two blocks may fail if there are blocks higher up
• MC-267474 Strings referencing the player's off hand are inconsistently spelled
• MC-267498 Operation names in /attribute and item modifiers' set_attributes are different
• MC-267947 Ender pearls can teleport players in spectator mode
• MC-267951 The game freezes and eventually crashes when creating a world with the "spawnChunkRadius" gamerule set to high values
• MC-267954 World upgrade and downgrade realms strings are improperly capitalized
• MC-267967 Breezes ignore the deflects_projectiles entity type tag
• MC-267968 Medium slimes from trial chamber spawners take damage incorrectly when first hit
• MC-267981 The "Trial Spawner crackles" subtitle is only displayed for a split second upon the "minecraft:block.trial_spawner.ambient" sound being played
• MC-267988 Tamed entities ignore their "LookAtPlayerGoal" distance and look in the direction of their owners from any distance when being stood up
• MC-268023 The "selectWorld.experimental.details.title" string displayed within the experimental features details menu is improperly capitalized
• MC-268106 Entities' current health is not capped at their max health in all applicable situations
• MC-268113 the minecraft:generic.scale attribute is desynchronized when the player leaves the End dimension via an End portal
• MC-268185 Copper grates in trial chambers are waterlogged
• MC-268347 Setting gravity higher than 0.84 allows you to jump up a block
• MC-268367 Arrows repeatedly bouncing off a breeze spam sound
• MC-268369 Wind charges delete arrows without blowing up
• MC-268370 Japanese CJK variants use the same diacritic
• MC-268438 Baby armadillos can still eat while rolled up
• MC-268551 When a wind charge is fired from a dispenser, it makes a "dispensed item" sound instead of a "Wind Charge flies" sound
• MC-268564 Entities receive knockback from incorrect directions when being hit by projectiles deflected by breezes
• MC-268598 The "weight" of skeletons in swamp biomes is too high causing less bogged spawns
• MC-268772 Fall damage multiplier attribute has unintuitive coloring
• MC-269034 Wolves no longer teleport while trying to pathfind out of Lava
• 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-269318 Books placed on a lectern in creative mode are consumed
• MC-269351 The Bolt Armor Trim cannot be duplicated with Waxed Copper Block
• MC-269359 "Field Masoned", "Skull Charge", "Flow", and "Guster" banner patterns are not mirrored on the backside
• MC-269370 Sharp lag spike caused by incorrect upper limit on particles created by mace smash attack
• MC-269389 Flow banner pattern is treated as common loot
• MC-269390 Guster banner pattern is treated as common loot
• MC-269439 Some diacritics intersect the language box in the languages menu
• MC-269460 Thorns enchantment doesn't work when entities are hit by wind charges
• MC-269574 Client attribute values may desync from the server after leaving the end
• MC-269601 Mace smash attack does not knock back other players when they are not the attacked entity
• MC-269617 When ender pearls teleport non-player entities, no teleportation sound is played upon impact
• MC-269633 Placing an oversized filled bucket resets the stack size to 1
• MC-269642 Eating an oversized Soup / Stew resets the stack size to 1
• MC-269674 Oversized book and quill stacks reset count when signed
• MC-269685 Buckets are lost when consuming oversized milk buckets
• MC-269686 Oversized music disc stacks can be duplicated with jukeboxes
• MC-269708 Dispensers using an oversized stack of Water Bottles resets the stack size to 1
• MC-269717 Cauldron deletes overstacked tinted shulker boxes
• MC-269809 Feeding an axolotl an oversized tropical fish bucket resets the stack size to 1
• MC-269881 Flow and Bolt Armor Trims don't grant "Crafting a New Look" advancement
• MC-269921 Wind charges can be thrown though corners
• MC-269951 When the gamerule "doImmediateRespawn" is set to true, the Wind Charged, Oozing or Weaving effects don't function for players
• MC-269958 New effects are not required for the "How Did We Get Here?" advancement
• MC-269964 Ominous item spawners are missing an NBT load for spawn_item_after_ticks
• MC-269966 "A Furious Cocktail" Advancement does not require the new potion effects
• MC-269969 Using a normal trial key on the ominous vault grants Under Lock and Key advancement
• MC-269978 The centrial dispenser in eruption trial chamber is missing a water bucket
• MC-269988 New potion effects don't apply their respective behaviors when creeper explodes
• MC-270021 Drinking a single ominous bottle in survival doesn't grant bad omen with the correct amplifier
• MC-270024 When drinking ominous bottles, bad omen of higher levels can be overriden by lower amplifiers
• MC-270031 Arrows spawned from ominous trial spawner can be picked up
• MC-270033 Infested or Oozing effect cloud shrinks when silverfish or slime enters it
• MC-270047 Axes prioritize scraping copper over blocking with shields
• MC-270052 Blur levels below 10% do not appear to actually work
• MC-270181 Wind charges go through an entity if it is close to a player
• MC-270216 Mace smash attack particles cannot be reduced with the Particles setting
• MC-270278 "Who needs rockets?" is granted at heights lower than 8 blocks when using slow falling
• MC-270296 Ominous Item Spawner spawns unstackable arrows with potion effects
• MC-270301 The fire protection enchantment applied to horse armor no longer decreases the duration of time the horse remains ablaze
• MC-270377 Wind charges can be hit and redirected the moment they are thrown
• MC-270379 Buttons and Levers don't make sounds when toggled by Wind Charges
• MC-270499 Riptide trident in off-hand applies mace effects in main hand
• MC-270539 The blast protection enchantment, when applied to horse armor, no longer diminishes the knockback effect from explosions on horse
• MC-270540 The prevention of fall damage from wind charges is not retained upon reloading the world
• MC-270572 Programmer Art resource pack duplicates some GUI texture files
• MC-270573 Mounted entities are immune to wind charge damage
• MC-270584 Vault/Ominous Vault loot isn't predetermined, allowing players to create backups of their worlds to get desired rewards
• MC-270588 Hitting Wind Charges and Fireballs makes no sound
• MC-270635 Trial spawners textures are inconsistent
• MC-270637 maxEntityCramming set to 0 prevents slime spawning from oozing effect
• MC-270649 The width of challenge advancements header is calculated in relation to the slash formatting of progress counter, causing overlap in some languages
• MC-270682 modify_contents item modifier can create overstacked items
• MC-270684 set_attributes loot function doesn't accept an empty list
• MC-270749 Remote Getaway advancement is not granted when entering a gateway by throwing an ender pearl next to it
• MC-270779 Getting data with /data command from a block/chest with a large amount of data can cause the game to crash
• MC-270789 Only mace smash attacks increment "Times Used" stat
• MC-270791 Mace smash attack can knockback tamed mobs
• MC-270795 Mobs despawned by Ominous Trial Spawners can delete picked up items
• MC-270808 Any item in the armor.body slot protects wolves from taking damage
• MC-270818 Data generator items report is not deterministic
• MC-270821 Regular Trial Spawners spawn the first mob with Ominous Trial equipment if they were last active as Ominous
• MC-270849 Breeze can extinguish lit candles when mobGriefing is false
• MC-270926 "foodSaturationLevel" can be negative
• MC-270934 Missing trial chamber structure minecraft:trial_chambers/chamber/addon/c6
• MC-270965 The data type of the "minecraft:custom_data" component of the recipe result will be forcibly modified
• MC-270974 Breeze wind charges can change activation blockstates of redstone components when mobGriefing is disabled
• MC-270977 Breezes don't make deflection sounds
• MC-270981 View Bobbing toggle is not available in Accessibility Settings
• MC-271001 Items in a container can be given a count above 99 (to max integer), and can crash the world
• MC-271005 Knowledge books with a max stack size over 1 consume all items in the stack when used
• MC-271026 Components that set a status effect sometimes lose parts of the data
• MC-271034 List entries in the Social interaction menu are rendered over the background
• MC-271039 Upgrading to 1.20.5 leads to the removal of all enchantments if item had the "sweeping" enchantment without namespace
• MC-271094 Entity ID inside EntityTag is ignored when updating a world to 1.20.5
• MC-271157 "Telemetry is disabled" tooltip does not get updated when the client locale changes
• MC-271159 Banner pattern entries without colors are invalidated when upgrading to 1.20.5
• MC-271168 Demo timer does not respect "Text Background" setting
• MC-271170 Unexpected error when modifying skull's custom name to an invalid value
• MC-271199 Advancement 'Local Brewery' not granted on shift-clicking
• MC-271244 Auto-save text does not respect "Text Background" setting in accessibility settings
• MC-271293 Wind charge, fireball and shulker bullet makes a "Burning" sound as it passes through the lava
• MC-271353 Crafting UI flickers incorrect or blank recipes when choosing items from the recipe book
• 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-271897 End Portal makes items disappear
• MC-271980 Arrows/bee stingers stuck in players disappear when leaving the end
• MC-272014 Ender Dragon death animation is broken since 20w22a (and broken again in 20w45a
• MC-272073 Item displays with billboard and rotation values create major visual bug
• MC-272079 Medium/small Slimes and magma cube's attack reach is too short
• MC-272194 Empty Attribute Modifiers lost during upgrade
• MC-272198 Shulkers' models sometimes appear offset upon end city generation
• MC-272241 Error when traveling through nether portal outside world border
• MC-272253 The strength of the riptide enchantment is increased when holding tridents enchanted with riptide in both hands
• MC-272267 "Changes the blurriness of menu background" lacks punctuation
• MC-272279 Resource packs containing TrueType fonts fail to load on x64 macOS systems
• MC-272308 Axolots can be attached to new leads when being already leashed
• MC-272445 Command blocks made from Ctrl + Pick Block do not activate on first try
• MC-272469 When the wind charge, fireball or shulker bullet is in the lava, it will continue to make a high-loudness noise
• MC-272515 Component-Modified Saddles get their components wiped when dispensed onto a horse, mule, or camel.
• MC-272808 Step height steps too high when there's a gap the player can fit through
• MC-272996 Using "/execute in..." to switch dimensions causes the player to fall when flying

Every build Mojang published on the way to 1.21, in order.

1. Snapshot

   6

   Weekly work-in-progress build. Things break and get removed again.

   24w18a24w19a24w19b24w20a24w21a24w21b

2. Pre-release

   4

   Feature-complete; only bug fixes land between here and release.

   1.21-pre11.21-pre21.21-pre31.21-pre4

3. Release candidate

   1

   The build Mojang intends to ship unless a blocking bug turns up.

   1.21-rc1

4. Release

   1.21

   The build that shipped. Everything above led here.