🌍🔃 Changes in 21w18a
- Infested Blocks are no longer instantly destroyed. Instead, they have half the destroy time of their non-infested counterpart.
- Screaming goats will use their ram attack more often than other goats will

⛰️ Changes to the Caves & Cliffs Preview

🐛 Fixed bugs in 21w18a
- MC-3587 - Last use of an anvil causes player to drop their item
- MC-87935 - When closing the inventory while holding an item with the cursor in Creative mode, the item disappears
- MC-125033 - Old cave and ravine generation gets cut off unnaturally on chunk borders near water
- MC-162953 - NativeImage bounds checks are incorrect
- MC-197616 - Certain custom biome settings cause game to spam "Received invalid biome id: -1" in the console, causing major lag or freeze
- MC-204707 - Adventure mode players can extinguish candles
- MC-204969 - No "Burning" sound for items burning in lava cauldron
- MC-205797 - Zoglins attack Marker armor stands and Invisible armor stands
- MC-206560 - Pufferfish react to Marker armor stands and Invisible armor stands
- MC-208430 - Minecraft crashes when loading resource pack due to "tessellating block model"
- MC-208679 - Axolotl inconsistently doesn't show its mouth in-game
- MC-211064 - Loading in a TrueTypeFont with an out-of-bounds size crashes the game
- MC-214159 - Small Dripleaf sometimes shrink into smaller (1 block tall) Big Dripleaf when using bone meal
- MC-214427 - Spore Blossoms can be used to breathe underwater / cannot be waterlogged
- MC-214793 - Some strips of chunks generate completely dark
- MC-214808 - World occasionally fails to load correctly
- MC-214860 - Some chunks in a line are lit up constantly
- MC-214898 - Extreme world generation lag
- MC-215867 - Crash: java.lang.IllegalStateException: Chunk not there when requested
- MC-215946 - Game fatally crashed while exploring chunks (IllegalStateException: Accessing PalettedContainer from multiple threads)
- MC-216148 - Some chunks occasionally don't save properly, resetting progress
- MC-221647 - Goat Babies Don't Follow Parents
- MC-221725 - Legs of goats move differently
- MC-221727 - Goat eye height is outside of its hitbox while airborne
- MC-221840 - Goats can still do high jumps normally when on honey blocks
- MC-222151 - Goat head animation is weird when it rides a boat
- MC-222157 - Eye position of the goat is too high in some cases, causing suffocation
- MC-222458 - UVs on the goat's ears aren't mirrored as they should be
- MC-223141 - Piglins aren't attracted to a Block of Raw Gold
- MC-223145 - Piglins aren't angered when mining a Block of Raw Gold
- MC-223150 - Goats ram Marker armor stands & Invisible armor stands
- MC-223178 - Deepslate Tile Stairs come before Deepslate Brick Stairs in the creative inventory
- MC-223203 - Deepslate ore map colors are inconsistent with deepslate
- MC-223239 - Ramming sound that comes from a baby goat does not change pitch
- MC-223422 - When removing water from base of Small Dripleaf, the block stands without water untill a block update
- MC-224401 - Mob death does not show death particles
- MC-224428 - Raw ore blocks can generate as floating blocks in ore veins

🌍🔃 Changes in 21w19a
- The maximum length of item names in the anvil UI has been increased from 35 to 50
- Made geodes significantly rarer
- Unfinished items (Sculk Sensor, Bundles, and Candles) have been removed from the creative inventory
... and more!

⛰️ Changes to the Caves & Cliffs Preview
- The pack now includes recipes related to bundles and candles

⚙️ Technical changes in 21w19a

Item command
- /item replace <target> with <item stack> [<count>] - same as old replaceitem
- /item replace <target> from <source> [<modifier>] - copies item for source to target(s), optionally applying modifier
- /item modify <target> <modifier> - modifies item (without copying)

🐛 Fixed bugs in 21w19a
- MC-105080 - Ender Dragon is respawned if all Exit End Portal blocks are removed / legacy scanning is done for worlds with new dragon fight
- MC-136647 - Leads don't work with Squids
- MC-200009 - Crash when using a non-mushroom block in a huge mushroom feature's cap
... and more!

🌍🔃 Changes in 21w20a
- Actually made Geodes rarer this time
- GUI narration now includes position and usage of hovered or focused element
- Tilling Rooted Dirt with a Hoe will now convert it into Dirt, and pop out a Hanging Roots item
... and more!

⛰️ Changes to the Caves & Cliffs Preview

⚙️ Technical changes in 21w20a
- Added a new NBT tag for entities - "HasVisualFire" – which will cause any entity with this flag to visually appear on fire, even if they are not actually on fire

🐛 Fixed bugs in 21w20a
- 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
... and more!

🔗 Minecraft 1.17.1 Pre-Release 2

⚙️ Technical Changes
- Deaths of named mobs are now logged

🐛 Fixed Bugs
- MC-219290: Calcite is too quiet compared to other blocks
- MC-221656: Creative mode obtained Bucket of Axolotl/Tropical Fish only spawns one kind axolotl/tropical fish
- MC-226926: Emerald ore generates too often
- MC-228599: Attempting to walk through flowing water constantly switches the player from swimming into normal mode
- MC-229191: Diamond ore distribution changed between 1.16.5 and 1.17

🔗 Minecraft 1.17.1 Release Candidate 1

🐛 Fixed Bugs
- MC-230716: “death.attack.dryout” and “death.attack.dryout.player” display raw translation strings (are untranslated)

🔗 Minecraft Java Edition 1.17.1

🔃 Changes
- Blue axolotls can now only be obtained through breeding
- Non-screaming goats now have a rare chance to produce a screaming goat when bred
- Status effects on goats now also apply when the goat is jumping or ramming
- Raised the drop rate for copper ingots from Drowned to 11% + 2% per level of looting
- Powder snow now fills cauldrons 2 times faster than before (still pretty slowly, though!)

⚙️ Technical Changes
- Deaths of named mobs are now logged
- In case of DNS-based redirection, the client will send the hostname actually used to connect (this restores the pre-1.17 behaviour)

🐛 Fixed Bugs
- MC-123654: “Sun, moon, and/or clouds are not showing if render distance is below 4”
- MC-131290: “Enchantments are saved as shorts, but are loaded as and function with integer values”
- MC-156155: Turkish lira sign (₺) appears as □ in the game
- MC-194736: Duplicate text mapping for U+00B7
- MC-196999: U+1FEC is wrong in Minecraft’s font

🔗 Minecraft Snapshot 21w37a

🆕 New Features
- Added noise caves and aquifers
- Added Dripstone Caves underground biome
- Added Grove biome
- Added Lofty peaks biome
- Added Lush Caves underground biome

🔃 Changes
- Illagers (Vindicator, Pillager, Evoker) no longer attack baby villagers
- Axolotls now only spawn in lush caves
- Axolotls now have their own, separate, mob cap
- Raised the cloud level from 128 to 192

⚙️ Technical Changes
- Replaced the clientbound chunk update network packet with another one which additionally contains light update data. A separate light update packet still exists and is sent when a light update happens without chunk update.
- View distance now causes chunks to load cylindrically around players instead of in a square
- Information about the world generation noise is now displayed on the debug screen
- Added illageralt, rune-like font from Minecraft Dungeons (currently only usable via commands)
- Added startup option --jfrProfile and command jfr to start profiling with Java FlightRecorder as well as a few custom events.

🐛 Fixed Bugs
- MC-29274: Withers will not pursue players in survival mode unless attacked
- MC-30560: River through Eroded Badlands biome generates floating rock formations at water surface
- MC-54545: Client render distance doesn’t adjust to server render distance if they are different, causing faulty chunk loading
- MC-65628: Desert pyramids generate underground when using amplified or custom terrain
- MC-123277: Too long scoreboard objectives and team names are not detected when commands are parsed

🔗 Minecraft Snapshot 21w38a

🔃 Changes
- Sprinting is no longer reduced to walking when gently brushing your sleeve against a wall
- Fixes for the distribution of ores

⚙️ Technical Changes
- A new setting has been added: “Simulation distance”
- Maximum amount of background threads increased
- Added telemetry for world loading

🐛 Fixed Bugs
- MC-44055: Game fails to switch the audio output from one device to another after the game has started (from title screen)
- MC-236611: No sound for using shears on weeping, twisting, cave vines or kelp
- MC-236618: Strongholds don’t generate in 21w37a
- MC-236621: Liquids sometimes do not propagate
- MC-236633: Random light level of 0 in sky

🔗 Minecraft Snapshot 21w39a

🆕 New Features
- Added Caves & Cliffs: Part II Advancements

🔃 Changes
- The lone trees in Meadows now always contain a bee nest
- Drowned can spawn in aquifers inside dripstone caves
- Zombies don’t spawn in dripstone caves
- Buried treasure chests can now contain water breathing potions
- Changed default brightness to 50

⚙️ Technical Changes
- Added fall_from_height and ride_entity_distance advancement triggers
- Changed nether_travel to match other similar triggers
- Added new loot table function set_potion
- Changes to the on-disk chunk format
- Resource pack format has been increased to 8

🐛 Fixed Bugs
- MC-116359: Status effects aren’t displayed in inventory when recipe book is open
- MC-149822: Bottom border on status effect displays in the inventory is missing
- MC-193348: Status effect bars shift the player’s inventory in creative mode
- MC-196723: Potion effects obtained in creative mode while in inventory do not show up until reopening inventory
- MC-214894: Bamboo generates in caves under jungles

🔗 Technical changes in 21w40a

🔃 Changes
- World generation tweaks
- Changes to mob spawning
- Copper Ore now drops 2-5 (from 2-3) Raw Copper items
- In the Stonecutter, a Block of Copper can be converted to four Cut Copper
- A bunch of biome variants with similar features but different shapes have been merged into one since the shape is controlled independently now

⚙️ Technical Changes
- Optimized AI for Axolotls, Goats, Hoglins, Zoglins, Piglins, Piglin Brutes and Villagers
- Bedrock layers generate dependent on the world seed now

🐛 Fixed Bugs
- MC-132306: Snowy grass without snow near lakes in snowy biome
- MC-169523: As of 18w06a, the sand, clay and gravel blocks no longer generate around small lakes
- MC-197688: Mountain Edge never generates
- MC-217906: Large amounts of axolotls cause performance issues
- MC-225842: Flowers can generate on large plants near lakes

🔗 Minecraft Snapshot 21w41a

🔃 Changes
- The main menu backdrop now shows a Caves & Cliffs: Part II scene
- Badlands mineshafts generate higher up
- Geodes now only generate up to height 30 and their rarity has been adjusted to match 1.17 levels
- The angle at which sprinting against a block does not break your sprint has been increased a bit

⚙️ Technical Changes
- Changed the prioritization order of the chunk rendering pipeline
Unrendered chunk holes in the world should not appear anymore while flying fast with a high render distance


- Server classes are now signed
- New random number generator for Overworld generation

🐛 Fixed Bugs
- MC-118134: Item frame texture as an item uses texture of oak planks
- MC-137950: Signs textures does not correspond to the actual texture of their handle
- MC-142385: Campfire texture has one pixel extending into hotbar outline
- MC-148182: The zombie villager "profession" texture uses villager-skin-colored pixels
- MC-152506: Wither skull projectile has faces with old texture

🔗 Minecraft Snapshot 21w42a

🆕 New Features
- New music has been added to the game
- Added world autosave indicator for single-player worlds

🔃 Changes
- World spawn selection algorithm has been reworked, now spawns player according to climate parameters
- World generation tweaks

⚙️ Technical Changes
- Replaced light and barrier particles with block_marker

🐛 Fixed Bugs
- MC-129912: Player no longer spawned at highest level at world spawn
- MC-132347: Spawning inside icebergs
- MC-214288: Player does not spawn on the surface of the world when min_y is greater than 0
- MC-233771: Parity issue: Light blocks do not display their light level when shown via a held light block item
- MC-236837: The player can occasionally spawn underground when loading into a new world