Minecraft 1.21.9 Pre-Release 2: Copper Golem Updates & Full Patch Notes

Mojang has rolled out Minecraft 1.21.9 pre-release 2, the latest step before the official launch of The Copper Age update. After months of snapshots, all the major features are locked in, and the developers are now focusing on polishing gameplay, fixing bugs, and tweaking mechanics.

This update brings important Copper Golem behavior changes along with several bug fixes that improve stability and gameplay parity between Java Edition and Bedrock Edition.

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Let’s dive into all the details from the Minecraft 1.21.9 pre-release 2 patch notes.

Key Changes in Minecraft 1.21.9 Pre-Release 2

• Copper Golems oxidize regardless of doDaylightCycle

                    Previously, their oxidation was tied to the day-night cycle, which made no sense for active gameplay. Now, they will oxidize naturally, independent of world time settings.

• Copper Golem statue mechanics updated
• Behavior for turning into statues now mirrors Bedrock Edition.
• They no longer need to be perfectly centered in a block space to become a statue.
• Fully oxidized Copper Golems can now instantly turn into statues.

Technical Changes

• Data Pack version updated to 88.0

                This aligns with breaking changes introduced in Minecraft 1.21.9-pre1 for /setworldspawn and /spawnpoint.

Bug Fixes in Minecraft 1.21.9 Pre-Release 2

Mojang addressed a range of issues, many tied to the Copper Golem:

• MC-300362 – Copper golems not oxidizing when doDaylightCycle was disabled.
• MC-301566 – Sound crashes during resource pack reload.
• MC-301706 – Server Management Protocol failing with parameters as object.
• MC-301770 – Incorrect nameplate display for players/mannequins named deadmau5.
• MC-301963 – Copper golems causing lag spikes when checking chests.
• MC-302088 – Oxidized Copper Golems taking too long to turn into statues.
• MC-302112 – Incorrect hitboxes for posed mannequins.
• MC-302117 – Broken text display billboarding.
• MC-302120 – Mob spawning failing due to dimension-specific spawn points.
• MC-302148 – Copper Golems getting stuck while searching chests.
• MC-302164 – Breaking change to /setworldspawn and /spawnpoint in minor datapack version.

Why This Update Matters

The Copper Golem is shaping up to be one of the most dynamic additions in Minecraft: The Copper Age. By fixing oxidation mechanics and refining statue transformation, Mojang ensures smoother gameplay and better parity across editions.

This pre-release also addresses stability, reducing lag, fixing server protocol issues, and ensuring smoother mannequin interactions.

With Minecraft 1.21.9 pre-release 2, Mojang is closing in on a polished release of The Copper Age. Players can now expect more consistent Copper Golem behavior, reduced lag, and fixes to long-standing bugs.

Stay tuned for the official release of Minecraft 1.21.9 — and in the meantime, enjoy experimenting with the new Copper Golem mechanics!