Java Edition 1.17.1 Pre-release 1

1.17.1 Pre-release 1 (known as 1.17.1-pre1 in the launcher) is the first pre-release for Java Edition 1.17.1, released on June 18, 2021, which tweaks some game mechanics and fixes bugs.

Blocks

 * Cauldrons
 * Powder snow now fills cauldrons 2 times as fast as before.

Mobs

 * Axolotl
 * Blue axolotls now only spawn through breeding.


 * Drowned
 * Increased the drop probability of copper ingot from 5% to 11%, and increased the drop rate boost with each level of Looting spell from 1% to 2%.
 * This change is to match 's drop rates.


 * Goats
 * Breeding common goats now has a chance to produce screaming goats.
 * Status effects applied to goat goats now also apply when the goat is jumping or ramming.


 * Zombies, Zombie Villagers, Husks and Drowned
 * No longer pick up glow ink sacs.
 * This prevents zombies from persisting after picking up the loot of a dead glow squid.

General

 * Protocol
 * Handshake packet padding method for "hostname" and "port" field has reverted to pre-1.17 when the server address which used is a SRV record.
 * Now, data padded in these field will use the address and port which SRV record pointed at, instead of using "server address" as "hostname" and 25565 as "port".

Fixes

 * Other
 * Duplication exploit with anvils.

Video
Videos made by slicedlime: