Java Edition 1.21.9 Pre-Release 2

Minecraft 1.21.9 Pre-Release 2

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	dec: 1073742094  hex: 4000010E
Data version	4550
Resource pack format	69.0
Data pack format	88.0
Minimum Java version	Java SE 21
◄◄  1.21.8 1.21.9 1.21.10 ►► ◄  1.21.9 Pre-Release 1 1.21.9 Pre-Release 2 1.21.9 Pre-Release 3 ►

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    "title": "Minecraft 1.21.9 Pre-Release 2",
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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.

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

• The data pack format version is now 88.0.
  • This is due to breaking changes to /setworldspawn and /spawnpoint in the previous pre-release.

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.

Videos

Video made by slicedlime: