Minecraft 1.17 Snapshot 21w20a – Patch Notes, Release Date, Time (Today, May 19)

Here are the patch notes of Minecraft 1.17 Snapshot 21w20a.

By Md Armughanuddin

May 19, 2021

Minecraft 1.17 Caves and Cliffs update is slated to release later this year, and it is all set to be one of the biggest Minecraft updates. Recently, the developers announced that it will be split into two parts, with the first one coming as early as Summer.

With the update being of such a big scale, fans are eagerly looking forward to what new stuff will be added. Thankfully, Mojang Studios is giving players a chance to try out the new features via Snapshots and Bedrock Beta.

Minecraft Dungeons: Flames of the Nether – Official Launch Trailer

Minecraft Dungeons: Flames of the Nether – Official Launch Trailer

When will Minecraft 1.17 Snapshot 21w20a release?

Minecraft 1.17 Snapshot 21w20a has already been released and is available for download.

Minecraft 1.17 Snapshot 21w20a – Patch Notes

Here are the patch notes of Minecraft 1.17 Snapshot 21w20a.

Another snapshot is now going out. This time around, we fixed quite a few bugs, and we also introduced some changes to some Caves & Cliffs features, and additionally, we added some extra context for the narrator..


  • 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
  • Axolotls will now only play dead when in water
  • Llamas no longer spit at players in peaceful mode


Download the updated datapack.


  • 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


  • 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
  • MC-172304 – Piglins, piglin brutes, hoglins, zoglins and axolotls can attack their own teammates
  • MC-189535 – Catching a fish in a bucket on creative mode doesn’t give player new bucket
  • MC-191338 – Name color for Minecart with Command Block is incorrect
  • MC-192591 – Name color for Structure Void is incorrect
  • MC-198200 – Crash when leaving out processors in a template pool: java.lang.IllegalArgumentException: bound must be positive
  • MC-203712 – Amethyst Geodes cause floating water/lava to generate when intersecting water/lava caves/pools
  • MC-203867 – Amethyst geodes can overwrite bedrock
  • MC-204393 – Lava Cauldron emits redstone signal strength 1 instead of 3
  • MC-204902 – Dirt paths are no longer compatible with the programmer art resource pack
  • MC-205104 – Rideable mobs are not affected by powder snow’s freezing effect while being ridden
  • MC-205120 – Freezing hearts aren’t displayed properly in Programmer Art resource pack
  • MC-205250 – Amethyst geodes can generate in a stronghold and can potentially destroy the end portal frames
  • MC-205680 – minecraft:location_check predicate floating point imprecision
  • MC-206107 – Parrots sitting on shoulders do not freeze in powder snow
  • MC-206131 – Amethyst blocks are transparent / don’t conduct Redstone
  • MC-206601 – Potion particles are showing when looking through spyglass
  • MC-206839 – Pointed dripstones cause extreme durability damage to helmets
  • MC-207324 – Mobs and particles sometimes don’t fully render behind stained or tinted glass
  • MC-207366 – Trying to modify the world height of a world after it’s already been generated gives a null pointer exception
  • MC-208586 – Axolotls get stuck and spin constantly on top of lily pads
  • MC-208589 – Axolotls have a swimming animation (move their body up- and downwards) when on land
  • MC-208601 – Axolotls do not avoid lava when pathfinding
  • MC-208617 – Axolotls sometimes twitch rapidly when adjusting their rotation
  • MC-208641 – Axolotl movement glitch on stairs
  • MC-208649 – Breeding axolotl with a bucket of tropical gives back a bucket instead of a water bucket
  • MC-208654 – Collecting an axolotl with a water bucket in creative mode replaces the original bucket
  • MC-208675 – Axolotls sometimes use walking animation when in shallow water
  • MC-208682 – Axolotls frequently get stuck inside of waterlogged blocks
  • MC-208691 – Axolotls play dead even when they take damage without being attacked by an entity
  • MC-208735 – Axolotls attempt to pathfind towards unreachable water, then start spinning, eventually drying out and dying
  • MC-209324 – Pointed Dripstone can be broken with tridents in spawn protection
  • MC-212125 – Only one glow lichen drops when using shears on multiple in a single block space
  • MC-212531 – Shulkers can rotate their heads up and down
  • MC-212931 – Fire extinguishing sound doesn’t play when mobs are extinguished with rain/water
  • MC-214041 – Mob can’t properly or difficult walk on big dripleaf, when the big dripleaf is 4 blocks or more from the ground
  • MC-214909 – Top half of a small dripleaf can turn into a ghost block when placing it in water while the water is being removed
  • MC-215665 – Amethyst Geodes can overlap with dungeons
  • MC-216214 – netherrack_replace_blobs with water as target crashes the game
  • MC-216980 – Comma splices in two source strings (EN_US)
  • MC-217113 – Foxes spawned inside of powder snow sleeps
  • MC-217608 – The big dripleaf texture is not vertically centered
  • MC-217742 – Campfires and TNT can be lit by players using arrows shot from flame bows in spawn protection
  • MC-219856 – F3 + L isn’t sorted alphabetically in the debug screen
  • MC-219870 – The Mojang loading screen upon start up flashes black
  • MC-220063 – Sweet berries and glow berries sound events are named extremely differently
  • MC-220128 – Parity Issue: Rooted dirt won’t turn into the dirt and drop roots item after tilling with hoe in Java
  • MC-220694 – Name color for knowledge book is incorrect
  • MC-220867 – Fossils can generate through bedrock
  • MC-221566 – Name color for light is incorrect
  • MC-221694 – Strays do not spawn in powder snow
  • MC-221833 – Light blocks are not shown within structure block bounds with Show Invisible Blocks on
  • MC-221863 – Powder Snow can be broken by players on fire in spawn protection
  • MC-221984 – Collecting an axolotl in a bucket and then placing it resets its kill cooldown
  • MC-222002 – Light item displays the wrong level number
  • MC-222116 – Splash water bottles doesn’t extinguish candle cakes
  • MC-222797 – Axolotl can be bred with just tropical fish items, not just bucket ones
  • MC-223322 – Chorus flowers can be broken with projectiles in spawn protection
  • MC-223372 – You can decrease the level of a water or powder snow cauldron, through the use of an entity on fire in spawn protection
  • MC-224320 – minecraft.used:minecraft.potion doesn’t increase when filling a partially filled cauldron with a water bottle
  • MC-224322 – Powder snow can create ghost blocks in creative mode
  • MC-224480 – Powder snow doesn’t melt into water in cauldrons
  • MC-224482 – Superflat presets no longer generate with decorations
  • MC-225078 – Upgrading from 1.12.2 and below will cause items to lose enchantments
  • MC-225253 – Dying in a nether portal softlocks the player on the “You Died!” menu
  • MC-225347 – cave_vines_plant isn’t in #bee_growables
  • MC-225352 – Geodes have not been made “significantly rarer”
  • MC-225360 – Cannot resolve SRV records: unknown host
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Md Armughanuddin

Md is the Head of Content- India for DualShockers. He is pursuing Computer Science Engineering and is really passionate about gaming and technology. You can find him cracking complex coding problems during the day, and covering the latest happenings in the industry at night.

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