Java Edition 1.20.3 Pre-Release 1

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1.20.3 Pre-Release 1 (known as 1.20.3-pre1 in the launcher) is the first pre-release for Java Edition 1.20.3, released on November 20, 2023,^[1] which makes changes to world resource packs and fixes bugs.

Grass

• Renamed "Grass" to "Short Grass".
• The ID has been changed from grass to short_grass.

Data pack

• The data pack version is now 26.

Resource pack

• The resource pack version is now 22.
• Changes to downloaded/world resource pack handling.
  • Changes apply to world resource packs (resources.zip), Realms resource packs and resource packs controlled by dedicated servers.
• UI download screen has been replaced with a toast.
• World resource pack application starts together with chunk loading.
• Downloaded packs are now stored in downloads directory (with different file organization than old server-resource-packs)
  • Files in this directory are no longer automatically cleaned (previously only up to 10 packs were kept).
  • Additionally, inside this directory there is also log file log.json that stores information about downloaded files for debug purposes.
• Downloaded packs now have unique id (GUID/UUID) that can be used to differentiate them.
  • This value for dedicated server pack can be configured with the resource-pack-id option in server.properties.
  • If the value is missing, it is generated based on URL.
  • If hash of a pack is not set, this pack is redownloaded before every application.
  • Previously, if hash was missing, the latest downloaded version of a pack was applied.

General

• Some additional options are added for 3rd-party servers software:
  • Client can now accept multiple server resource packs.
  • New packet was added to un-apply server resource packs.
  • Resource packs are no longer cleaned when entering configuration phase.

These additions only take effect when the Update 1.21 experimental data pack is enabled.

Tags

• Added the following entity type tag:
  • #can_turn_in_boats: contains breeze.

18 issues fixed

From released versions before 1.20

• MC-142160 – pausedTickDelta updated when the game is unpaused rather than paused.
• MC-147649 – Can't copy or select command block output.
• MC-164316 – Resource pack update by a hash doesn't work.
• MC-173434 – Server resource pack download is inconsistent.
• MC-185117 – Narrator Disabled text in toast is no longer vertically centered.
• MC-251126 – Server resource pack is not redownloaded when a hash mismatch is detected with the previously downloaded version.

From 1.20

• MC-265927 – Edit box length restrictions can result in unpaired surrogate characters.
• MC-265929 –  +  a word with non-BMP characters in an edit box deletes additional characters.

From the 1.20.3 development versions

• MC-266456 – Breezes in minecarts or boats are passive.
• MC-266468 – Breeze cannot attack in deep water.
• MC-266472 – Charged creeper / wither armor is rendered incorrectly.
• MC-266507 – Number of block drops from TNT explosions is capped to 16.
• MC-266563 – End Crystals and TNT Minecarts that explode without a source entity deal no damage at all.
• MC-266571 – Breezes won't attack while under the effects of levitation status.
• MC-266656 – The interpolation of particle, entity and block entity transforms is disrupted when pausing the game in singleplayer.

From the previous development version

• MC-266723 – Monsters Hunted advancement requires killing a Breeze even when they're disabled.
• MC-266724 – /scoreboard players reset <targets> <objective> no longer works.
• MC-266729 – Unformatted objects in scoreboard error messages.