Java Edition 1.21.9 Pre-Release 2

Minecraft 1.21.9 Pre-Release 2
1.21.9-pre2.jpg: Infobox image for Minecraft 1.21.9 Pre-Release 2 the version in Minecraft
Java Edition 1.21.9 Pre-Release 2.png: Infobox image for Minecraft 1.21.9 Pre-Release 2 the version in Minecraft
Edition

Java Edition

Release date

September 19, 2025

Type

Pre-release

Pre-release for

1.21.9

Downloads

Client (.json)
Server

Obfuscation maps

Client
Server

Protocol version

 dec1073742094
 hex4000010E

Data version

4550

Resource pack format

69.0

Data pack format

88.0

Minimum Java version

Java SE 21

1.21.9 Pre-Release 2 (known as 1.21.9-pre2 in the launcher) is the second pre-release for Java Edition 1.21.9, released on September 19, 2025.[1]

Changes

Mobs

Copper golem

  • The copper golem's behavior for turning into a statue has been tweaked to match Bedrock Edition.
    • Copper golems no longer need to be close to the center of an empty block position in order to turn into a statue.
    • Copper golems now have the possibility to turn into a statue as soon as they become fully oxidized.

General

Data pack

Fixes

11 issues fixed

From 1.21.8

  • MC-301770 – The below_name plate is not displayed higher for players and mannequins named “deadmau5”.

From the 1.21.9 development versions

  • MC-300362 – Copper golems do not oxidize when doDaylightCycle is disabled.
  • MC-301566 – Occasional sound crash on resource pack reload.
  • MC-301706 – Server Management Protocol does not support parameters as object (by-name).
  • MC-301963 – Copper golems cause huge lag spikes when checking chests.
  • MC-302088 – Oxidized Copper Golems take an extremely long time to turn into a statue.

From the previous development version

  • MC-302112 – Posed mannequins don't use the correct hitbox.
  • MC-302117 – Text display billboarding is broken.
  • MC-302120 – Dimension-specific world spawn point causes mob spawning in other dimensions to fail.
  • MC-302148 – Copper Golem does not get close enough to search the chest, getting permanently stuck.
  • MC-302164 – Breaking change to /setworldspawn and /spawnpoint in minor datapack version.

Video

Video made by Slicedlime:

References

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