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Minecraft 25w21a

Weekly work-in-progress build. Things break and get removed again. Full source data for this version is extracted and browsable below.

2,671 names shipped in this version. Each result opens the wiki page for that thing.

Contents (8)
  1. What changed in 25w21a
  2. Sound events
  3. New in-game text
  4. Reworded text
  5. Fixes
  6. Development cycle
  7. Browse this version
  8. Neighbouring versions

Java What changed in 25w21a

Everything below is measured by comparing the game files of 25w20a with 25w21a — not copied from patch notes.

+6Sound events

Sound events +6 · −2

Removed: minecraft:entity.leash_knot.break, minecraft:entity.leash_knot.place

New in-game text 8

KeyText
mco.configure.world.loadingLoading Realm
mco.play.button.realm.closedRealm is closed
subtitles.item.horse_armor.unequipHorse Armor snips away
subtitles.item.lead.breakLead snaps
subtitles.item.lead.tiedLead tied
subtitles.item.lead.untiedLead untied
subtitles.item.llama_carpet.unequipCarpet snips away
subtitles.item.saddle.unequipSaddle snips away

Reworded text 4

Wording Mojang changed in this version.

KeyBeforeAfter
menu.custom_screen_info.contentsThe contents of this screen are controlled by third-party servers and maps that are not owned, operated, or supervised by Mojang Studios or Microsoft. Handle with care! Always be careful when following links and never give away your pesonal information, including login details. If this screen prevents you from playing, you can also disconnect from server by using button below.The contents of this screen are controlled by third-party servers and maps that are not owned, operated, or supervised by Mojang Studios or Microsoft. Handle with care! Always be careful when following links and never give away your personal information, including login details. If this screen prevents you from playing, you can also disconnect from the current server by using the button below.
music.game.mice_on_venusC418 - Mice On VenusC418 - Mice on Venus
music.game.oxygeneC418 - OxygeneC418 - Oxygène
music.game.swamp.labyrinthineLena Raine - LabryinthineLena Raine - Labyrinthine

Fixes 20

Read from Mojang’s own release notes for Minecraft Snapshot 25w21a, published 2025-05-20. Every entry keeps its original bug ID.

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

Fixed bugs in 25w21a 20

  • MC-36696 Clicking on the statistics button on the menu screen advances the game by 1 tick
  • MC-112730 Beacon beam and structure block render twice per frame
  • MC-236464 Beacon beams emitted from below the player are invisible after reloading chunks
  • MC-258336 Frost Walker causes frequent visual corruption near chunk borders on Threaded and Semi-Blocking Chunk Builder
  • MC-296337 Minecarts cause memory usage increases and crashes
  • MC-297264 Cat breeds are not seed based anymore
  • MC-297336 Experience orbs from thrown bottles o' enchanting are very prone to getting stuck inside blocks when thrown against a corner
  • MC-297615 Untranslatable error message when trying to join a closed Realm
  • MC-297803 The string "menu.custom_screen_info.contents" misspells "personal" as "pesonal"
  • MC-297806 music.game.swamp.labyrinthine misspells the song's title
  • MC-297808 music.game.oxygene is missing the grave accent sign
  • MC-297812 Bold text is rendered differently than in previous versions
  • MC-297813 Amos Roddy is not listed in the credits
  • MC-297823 music.game.mice_on_venus is using wrong capitalization
  • MC-297845 Clicking the Statistics button in Singleplayer does not play the button click sound until you resume playing
  • MC-297846 The music toast flashes in the pause menu when the Music slider is set to zero
  • MC-297875 Text shadow from underlined text overlaps the text below it in chat messages
  • MC-297888 Text no longer renders in a consistent order across different fonts
  • MC-297917 The client stops responding when showing a dialog with an extremely wide button
  • MC-297977 Dialog columns layout has extra spacing between the grid and the overflow linear layout

Development cycle

This build was part of the run-up to 1.21.6. Everything tested here landed in that release.

Browse this version