We're bringing you the first Pre-Release of 1.20.3 with updates to server resource pack handling and bug fixes!

Technical Changes

World resource packs

Changes apply to world resource packs (resources.zip), Realms resource packs and resource packs controlled by dedicated servers.

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 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 resource-pack-id option in server.properties
If the value is missing, it will be generated based on URL
If hash of a pack is not set, this pack will be redownloaded before every application
- Previously, if hash was missing, latest downloaded version of pack was applied

Some additional options are added for 3rd-party servers software:

MC-142160 pausedTickDelta updated when the game is unpaused rather than paused
MC-164316 Resource pack update by a hash doesn't work
MC-251126 Server resource pack is not redownloaded when a hash mismatch is detected with the previously downloaded version
MC-265927 Edit box length restrictions can result in unpaired surrogate characters
MC-265929 Ctrl+Backspacing a word with non-BMP characters in an edit box deletes additional characters
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
MC-266723 Monsters Hunted advancement requires killing a Breeze even when they're disabled
MC-266724 scoreboard players reset no longer works
MC-266729 Unformatted objects in scoreboard error messages