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Minecraft 1.21.5-pre1

Feature-complete; only bug fixes land between here and release. Full source data for this version is extracted and browsable below.

2,650 names shipped in this version. Each result opens the wiki page for that thing.

Contents (6)
  1. What changed in 1.21.5-pre1
  2. New in-game text
  3. Fixes
  4. Development cycle
  5. Browse this version
  6. Neighbouring versions

Java What changed in 1.21.5-pre1

Everything below is measured by comparing the game files of 25w10a with 1.21.5-pre1 — not copied from patch notes.

New in-game text 1

KeyText
multiplayer.disconnect.bad_chat_indexReceived missed or reordered chat message from server
Full comparison pageEvery registry, side by side

Fixes 15

Read from Mojang’s own release notes for Minecraft 1.21.5 Pre-Release 1, published 2025-03-11. Every entry keeps its original bug ID.

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

Fixed bugs in 1.21.5 Pre-Release 1 15

  • MC-170134 Minecraft uses several times more VRAM than needed after exploring terrain for a while
  • MC-279350 Leaf litter multipart model system is unoptimized, causing render lag
  • MC-280141 Baby farm animals from spawn eggs with a variant differing from the parent flash the wrong variant initially
  • MC-280241 Cold Cows have improperly mirrored and incorrectly aligned ear textures
  • MC-280249 Spawn eggs don't use their old textures with the Programmer Art resource pack enabled
  • MC-280278 Sheep wool uses 1.14 texture with Programmer Art resource pack enabled
  • MC-280326 When teleporting across dimensions an error is often thrown
  • MC-280361 When a fallen tree replaces the bottom half of tall vegetation, the top part of the vegetation still generates
  • MC-280474 TNT minecarts explode regardless of tntExplodes gamerule
  • MC-280477 TNT still explodes when summoned or dispensed while tntExplodes gamerule is false
  • MC-280479 TNT is completely deleted when attempting to ignite it using redstone pulses when the “tntExplodes” gamerule is disabled
  • MC-280480 No flint and steel clicking sound when attempting to ignite TNT with a flint and steel when the "tntExplodes" gamerule is disabled
  • MC-280493 If the tntExplodes game rule is changed to false while primed TNT already exists in the world, the primed TNT explodes as normal
  • MC-280501 The "Fire extinguishes" sound plays every game tick while on fire in rain
  • MC-280520 ItemDropChance on an item frame is not serialized when there is no item anymore, leading to inconsistencies

Development cycle

This build was part of the run-up to 1.21.5. Everything tested here landed in that release.

Minecraft 1.21.5The release this one led to

Browse this version

BlocksEvery blockItemsEvery itemRecipesEvery recipeTagsEvery tag

Neighbouring versions

← 25w10a (previous)1.21.5-pre2 (next) →