Minecraft 1.21.9

Everything below is measured by comparing the game files of 1.21.8 with 1.21.9 — not copied from patch notes.

1.21.9 block and item additions

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

Blocks +62 · −1

Acacia ShelfBamboo ShelfBirch ShelfCherry ShelfCopper BarsCopper ChainCopper ChestCopper Golem StatueCopper LanternCopper TorchCopper Wall TorchCrimson ShelfDark Oak ShelfExposed Copper BarsExposed Copper ChainExposed Copper ChestExposed Copper Golem StatueExposed Copper LanternExposed Lightning RodIron ChainJungle ShelfMangrove ShelfOak ShelfOxidized Copper BarsOxidized Copper ChainOxidized Copper ChestOxidized Copper Golem StatueOxidized Copper LanternOxidized Lightning RodPale Oak ShelfSpruce ShelfWarped ShelfWaxed Copper BarsWaxed Copper ChainWaxed Copper ChestWaxed Copper Golem StatueWaxed Copper LanternWaxed Exposed Copper BarsWaxed Exposed Copper ChainWaxed Exposed Copper ChestWaxed Exposed Copper Golem StatueWaxed Exposed Copper LanternWaxed Exposed Lightning RodWaxed Lightning RodWaxed Oxidized Copper BarsWaxed Oxidized Copper ChainWaxed Oxidized Copper ChestWaxed Oxidized Copper Golem StatueWaxed Oxidized Copper LanternWaxed Oxidized Lightning RodWaxed Weathered Copper BarsWaxed Weathered Copper ChainWaxed Weathered Copper ChestWaxed Weathered Copper Golem StatueWaxed Weathered Copper LanternWaxed Weathered Lightning RodWeathered Copper BarsWeathered Copper ChainWeathered Copper ChestWeathered Copper Golem StatueWeathered Copper LanternWeathered Lightning Rod

Removed: minecraft:chain

Items +73 · −1

Acacia ShelfBamboo ShelfBirch ShelfCherry ShelfCopper AxeCopper BarsCopper BootsCopper ChainCopper ChestCopper ChestplateCopper Golem Spawn EggCopper Golem StatueCopper HelmetCopper HoeCopper Horse ArmorCopper LanternCopper LeggingsCopper NuggetCopper PickaxeCopper ShovelCopper SwordCopper TorchCrimson ShelfDark Oak ShelfExposed Copper BarsExposed Copper ChainExposed Copper ChestExposed Copper Golem StatueExposed Copper LanternExposed Lightning RodIron ChainJungle ShelfMangrove ShelfOak ShelfOxidized Copper BarsOxidized Copper ChainOxidized Copper ChestOxidized Copper Golem StatueOxidized Copper LanternOxidized Lightning RodPale Oak ShelfSpruce ShelfWarped ShelfWaxed Copper BarsWaxed Copper ChainWaxed Copper ChestWaxed Copper Golem StatueWaxed Copper LanternWaxed Exposed Copper BarsWaxed Exposed Copper ChainWaxed Exposed Copper ChestWaxed Exposed Copper Golem StatueWaxed Exposed Copper LanternWaxed Exposed Lightning RodWaxed Lightning RodWaxed Oxidized Copper BarsWaxed Oxidized Copper ChainWaxed Oxidized Copper ChestWaxed Oxidized Copper Golem StatueWaxed Oxidized Copper LanternWaxed Oxidized Lightning RodWaxed Weathered Copper BarsWaxed Weathered Copper ChainWaxed Weathered Copper ChestWaxed Weathered Copper Golem StatueWaxed Weathered Copper LanternWaxed Weathered Lightning RodWeathered Copper BarsWeathered Copper ChainWeathered Copper ChestWeathered Copper Golem StatueWeathered Copper LanternWeathered Lightning Rod

Removed: minecraft:chain

Mobs and entities +2

Copper GolemMannequin

How to make the new things 54

Hover a slot to see what goes in it.

Result	Made in	Recipe
Acacia Shelf	Crafting	6
Bamboo Shelf	Crafting	6
Birch Shelf	Crafting	6
Cherry Shelf	Crafting	6
Copper Axe	Crafting
Copper Bars	Crafting	16
Copper Boots	Crafting
Copper Chain	Crafting
Copper Chest	Crafting
Copper Chestplate	Crafting
Copper Helmet	Crafting
Copper Hoe	Crafting
Copper Lantern	Crafting
Copper Leggings	Crafting
Copper Nugget	Crafting	9
Copper Nugget	Blasting	Blasting5.0s · 0.1 XP
Copper Nugget	Smelting	Smelting10.0s · 0.1 XP
Copper Pickaxe	Crafting
Copper Shovel	Crafting
Copper Sword	Crafting
Copper Torch	Crafting	4
Crimson Shelf	Crafting	6
Dark Oak Shelf	Crafting	6
Iron Chain	Crafting
Jungle Shelf	Crafting	6
Mangrove Shelf	Crafting	6
Oak Shelf	Crafting	6
Pale Oak Shelf	Crafting	6
Spruce Shelf	Crafting	6
Warped Shelf	Crafting	6
Waxed Copper Bars	Crafting
Waxed Copper Chain	Crafting
Waxed Copper Chest	Crafting
Waxed Copper Golem Statue	Crafting
Waxed Copper Lantern	Crafting
Waxed Exposed Copper Bars	Crafting
Waxed Exposed Copper Chain	Crafting
Waxed Exposed Copper Chest	Crafting
Waxed Exposed Copper Golem Statue	Crafting
Waxed Exposed Copper Lantern	Crafting
Waxed Exposed Lightning Rod	Crafting
Waxed Lightning Rod	Crafting
Waxed Oxidized Copper Bars	Crafting
Waxed Oxidized Copper Chain	Crafting
Waxed Oxidized Copper Chest	Crafting
Waxed Oxidized Copper Golem Statue	Crafting
Waxed Oxidized Copper Lantern	Crafting
Waxed Oxidized Lightning Rod	Crafting
Waxed Weathered Copper Bars	Crafting
Waxed Weathered Copper Chain	Crafting
Waxed Weathered Copper Chest	Crafting
Waxed Weathered Copper Golem Statue	Crafting
Waxed Weathered Copper Lantern	Crafting
Waxed Weathered Lightning Rod	Crafting

Block entities +2

Particles +1

Sound events +43

New in-game text 191

Showing the first 80 of 191 new strings.

Reworded text 87

Wording Mojang changed in this version.

Read from Mojang’s own release notes for Minecraft: Java Edition 1.21.9, published 2025-09-30. Every entry keeps its original bug ID.

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

Fixed bugs in 1.21.9 157

• MC-383 In the world selection screen, world names/versions/timestamps can overflow the list to the right
• MC-2681 No loading progress bar whenever we create a new world or when the game is loading something
• MC-26334 Chat UI is forcibly cleared when killed
• MC-36783 Item frames/Glow item frames don't change their hitbox if they contain a map
• MC-46503 You can retain entities' shaders by running the "/kill" command while in spectator mode
• MC-46634 Thunder volume is not affected by weather volume settings
• MC-59413 Water and lava can drip from barriers
• MC-69216 Switching to spectator mode while fishing keeps rod cast
• MC-73881 Summoning monsters in peaceful difficulty spawns monster for 1 tick
• MC-89142 Changing jump key to "Enter" let player jump after completing chat line
• MC-94610 Missing loot table entries for mob heads from charged creepers
• MC-98200 All sound sliders except master are ignored by high-volume /playsound
• MC-98322 Flying after shifting between Creative/Spectator
• MC-99785 You can leash entities in spectator mode
• MC-119417 A spectator can occupy a bed if they enter it and then are switched to spectator mode
• MC-147784 Fletching table flashes crafting table's GUI for about a second upon right-clicking it in spectator mode
• MC-160528 End portals do not negate fall damage
• MC-163218 Players with the Sneak option set to "Toggle" can sneak while in GUIs
• MC-165991 TNT explosion no longer shows additional smoke particles since 1.15 Pre-release 1
• MC-173730 Shift-clicking water buckets against a waterloggable block doesn't place the water beside the waterloggable block
• MC-174759 Dragon eggs can be teleported to a height below void
• MC-183776 After switching game modes using F3+F4, you need to press F3 twice to toggle the debug screen
• MC-183784 Visual bug to the Game Mode Switcher debug menu after resizing the window
• MC-187850 "run_command" click_event doesn't work in written books if chat is hidden
• MC-191669 Sprinting is disabled when switching your gamemode to spectator while sprinting into a block or general obstruction
• MC-192907 The F3 debug menu cannot be toggled while chat is open
• MC-196443 When reducedDebugInfo is true, hitting F3+B and F3+G would still tell the player in chat that they are being toggled, despite nothing happening
• MC-197247 Using F3+D to clear pending lines keeps the previous delay for a new message
• MC-203401 Double-tapping forward button to sprint cannot be disabled/reconfigured
• MC-217956 Number keys do not work on the game menu with the debug pie
• MC-220842 Opening game mode switcher while spectating a mob with shader effect toggles the effect
• MC-220913 Parity issue: Adjusting slider in the sound settings when not being in a world does not play a sound of that category
• MC-223142 Player can move while spectating a marker
• MC-225088 Overworld surface is darker than before on low brightness
• MC-232968 Spectators can prevent the closing animation of a chest/barrel when viewing it at the same time as a non-spectator
• MC-234479 You can invite the same player multiple times to your realm even if they've already received an invitation or have already joined it
• MC-234737 Typo in exception message: "EmtyPoolElement"
• MC-235780 The beacon GUI incorrectly displays the "Beacon" tooltip when the mouse cursor is held over the "Done" or "Cancel" buttons
• MC-236508 The title within the "Add Server" menu is displayed as "Edit Server Info"
• MC-237016 The chat delay function continues to print messages despite the game being paused
• MC-237590 The word "chunks" is improperly capitalized within the render and simulation distance sliders
• MC-237843 Players can be idle kicked whilst viewing the end credits
• MC-238146 When you switch to Spectator mode while sleeping, the night never skips
• MC-238273 "Locked by another running instance of Minecraft" lacks punctuation
• MC-243759 Explosions won't damage an entity if the distance to its eyes is 0
• MC-249205 "minecraft.used:minecraft.potion" increases by a value of two when using water bottles to create mud in creative mode
• MC-250062 Several strings throughout the game contain comma splices
• MC-250193 Server log does not use the string representation of a player's GameProfile on a disconnect during encryption
• MC-251407 Darkness pulsing effect doesn't work in The End
• MC-254052 /locate doesn't work outside build limit
• MC-254668 Pressing Escape on the death screen's title screen warning respawns the player
• MC-257540 Sheep eat half as often as they did before 21w39a
• MC-257792 Output slot for trading menu is off-center
• MC-258191 Root system feature allows hanging root vertical span of 0, causing error
• MC-259347 Height limit warning message is shown when right-clicking the top of a block at the build height limit with a bucket
• MC-259571 Last player game mode not saved after player dies or the game is reloaded
• MC-259673 Tab selection works differently in world creation and statistics screens
• MC-259692 Sneaking and sprinting states are activated or toggled unexpectedly when releasing their input keys while an interface was just previously closed
• MC-259935 It can snow even when biome precipitation is set to NONE
• MC-260591 'execute on origin' and 'execute on owner' fail to find the targeted entity when it is in a separate dimension
• MC-260822 The "Done" and "Cancel" buttons within the beacon GUI no longer display tooltips when the mouse cursor is held over them
• MC-260920 Statistics screen columns are not accessible through keyboard navigation
• MC-261387 Redundant block_predicate_filter check in mangrove tree placement
• MC-262000 Unused texture: misc/white.png
• MC-262370 Some multiplayer strings are untranslatable
• MC-263597 The ender dragon's respawning noise cannot be turned down by the Hostile Mobs volume slider
• MC-264962 Strings that contain two inputs for a given action have inconsistent spacing and apostrophes
• MC-265290 Elements within the command block interface are not selected in order when using the TAB key
• MC-265807 Mobs don't drown if their Air NBT is less than -19
• MC-269838 Pumpkin seeds drop from sheared pumpkins is hardcoded
• MC-269839 Honeycomb drop from sheared bee nests and beehives is hardcoded
• MC-270172 Client and server desync for hooked players when changing gamemode to spectator
• MC-270190 Hovering over banner patterns in the loom UI does not display tooltips
• MC-270669 Incorrect argument order in translation key argument.block.property.novalue
• MC-270918 Loot tables for mob heads are missing copy_components loot function for custom_name
• MC-272584 Fireballs redirected by explosions caused by player owned entities no longer carry player ownership
• MC-273894 Some non-persistent mobs in spawn chunks continue to count towards mob cap when far away
• MC-273943 Sweet berries drop from harvested bushes is hardcoded
• MC-275244 Setting "width_smoothness" in file configured_carver to 0 causes the game to freeze or crash
• MC-275432 Subtitles are difficult to see within screens
• MC-276431 Dragon egg teleports above the build height limit and deletes itself
• MC-276568 Mipmapped versions of the armor trims atlas are generated
• MC-276629 Glow berries drop from cave vines appears to be hardcoded
• MC-276759 Scute drop from brushing armadillos is hardcoded
• MC-276826 Entity models render completely white in GUI screens while affected by glowing and invisibility at the same time
• MC-276931 Enchanted books have the wrong rarity
• MC-277447 Minecraft generates mipmapped textures for chests, but does not use them
• MC-277450 Minecraft generates mipmapped textures for shulker boxes, but does not use them
• MC-277470 Minecraft generates mipmapped textures for beds, but does not use them
• MC-277471 Minecraft generates mipmapped textures for signs, but does not use them
• MC-277473 Minecraft generates mipmapped textures for decorated pots, but does not use them
• MC-277481 Minecraft generates mipmapped textures for banners, but does not use them
• MC-277483 Minecraft generates mipmapped textures for shields, but does not use them
• MC-277661 Constantly rotating the player to their current rotation using /rotate produces jittery camera movement
• MC-277770 Processor type block_age always modifies slabs property "type" to bottom
• MC-277975 The first line of the command execution warning in an item's tooltip is missing punctuation
• MC-278435 Mushroom Fields biome doesn't generate pumpkin patches despite being specified in vanilla datapack
• MC-278550 While flying in creative or spectator mode, the surface of water can prevent you from sprinting
• MC-278965 Cherry Grove is not part of the #stronghold_biased_to tag
• MC-279123 Some strings that reference Minecraft Realms use inconsistent or missing verb forms
• MC-279153 Some strings that mention the base values of attributes are missing articles
• MC-279173 The "chat.disabled.invalid_command_signature" string is missing an article before the word "Command"
• MC-279174 The "gamerule.spawnChunkRadius.description" string is missing an article before the word "Amount"
• MC-279175 Some multiplayer disconnection strings are missing articles and demonstratives
• MC-279176 The "gamerule.commandModificationBlockLimit.description" string is missing an article before the word "Number"
• MC-279212 Some narration strings are missing articles and possessive determiners
• MC-279548 TNT minecart does not remember ignition source when exploding from a fall
• MC-279793 Mounting horses, donkeys, mules, zombie horses, skeleton horses, and camels no longer forces you to face forward
• MC-289348 Ender pearls stop loading chunks in The End after relog, if there are no players in that dimension
• MC-295829 Test instance block GUI uses "Batch" instead of "Environment"
• MC-295841 Interactive collision check path is broken
• MC-296054 Fast non-projectile entity movements may fail to apply block effects from blocks around the starting position when moving in positive directions
• MC-296055 Slow non-projectile entity movements may fail to apply block effects from origin block
• MC-296057 Sideways non-projectile movements may fail to apply block effects from blocks around start of sideways motion
• MC-296129 The sunrise/sunset effect flickers on Intel graphics of Gen9 architecture
• MC-296372 Teleport duration is unreliable as of 1.21.5
• MC-296789 The color of text within the test instance block interface is inconsistent with other similar interfaces
• MC-296897 Fast moving entities freeze the server which causes watchdog crash x2
• MC-297126 "Failed to read field..." error spam when upgrading a 25w15a or 25w16a world
• MC-297496 Text inside the middle of the java realms information box completely disappears when selected
• MC-297593 Cauldrons now apply the effect of the substance they're filled with when contacted from the underside
• MC-297898 Entering a dialog temporarily closes the chat and clears anything the player was currently typing
• MC-298274 Certain invalid commands give "see below for error" with no additional information
• MC-298605 When creating a Water World superflat world, the player spawns at the bottom of the sea
• MC-298732 The cursor is no longer shown at the end of lines that aren't the final one
• MC-298805 Axes disable shields even when the shield does not block the attack
• MC-298883 The active world slot is not highlighted when selected via TAB navigation in Realms
• MC-299067 Arrows can lose ownership on disconnection in multiplayer
• MC-299105 Tears and Lava Chicken music disc 'desc' translations are unused
• MC-299115 Arrows lose their owner tag when deflected while the owner is offline
• MC-299314 Breaking jukeboxes in certain ways doesn't stop the music
• MC-299450 You can no longer double-click to select characters in the book and quill interface
• MC-299451 Pages in book and quills are no longer automatically focused when switching pages
• MC-299548 "run_command" dialog actions don't work if chat is hidden
• MC-299566 The cursor in the book and quill interface is positioned too far to the left
• MC-299627 Entity interpolation for high speed projectiles is wildly inaccurate
• MC-299628 Mounted players/mobs trigger sculk sensors on world load
• MC-299770 Chunks loaded by ender pearls permanently unload upon player death even when enderPearlsVanishOnDeath is set to false
• MC-299782 Zombie villagers saved in jigsaw structures forget their biome variant and profession upon world generation
• MC-299823 Minecraft shaders cause C7050 warnings
• MC-299837 Running two or more /rotate commands in the same tick only applies the rotation of the last command
• MC-299872 The freezing overlay flashes when a freezing player touches fire
• MC-299873 Selection boxes of plain messages within dialogs can get cut off
• MC-299896 You can switch the worlds of expired realms to empty slots, which misleadingly prompts world creation despite no active realms subscription
• MC-299913 The "You don't seem to have a Realm..." focusable text widget now has a black background
• MC-300021 Some elements of the villager interface are now rendered above the cursor item
• MC-300034 Dolphins can ride boats
• MC-300092 F3 pie chart particle entries are missing names
• MC-300340 Continuously clicking "Continue" on the welcome page resets the button disappearance animation progress
• MC-300457 Dialog is unescapable when action or exit_action is set to run_command with a command that would produce a signed chat message
• MC-300856 I-beam cursor in book signing screen has wrong color
• MC-301447 Items with plain-String names created before 1.20.4 cause DFU JSON exception when loaded
• MC-301494 Falling particles no longer appear from floating sand or gravel
• MC-301510 GUI sprites nine slice performance regression
• MC-301619 Game mode translation key is used in the console message sent when a player tries to switch their game mode without permission
• MC-301770 The below_name plate is not displayed higher for players and mannequins named “deadmau5”
• MC-301883 Entities going through portals with their Motion set to more than 10 on an axis have their Motion tag reset

Every build Mojang published on the way to 1.21.9, in order.

1. Snapshot

   9

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

   25w31a25w32a25w33a25w34a25w34b25w35a25w36a25w36b25w37a

2. Pre-release

   4

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

   1.21.9-pre11.21.9-pre21.21.9-pre31.21.9-pre4

3. Release candidate

   1

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

   1.21.9-rc1

4. Release

   1.21.9

   The build that shipped. Everything above led here.