Minecraft 1.17.1-pre1

Everything below is measured by comparing the game files of 1.17 with 1.17.1-pre1 — not copied from patch notes.

Read from Mojang’s own release notes for Minecraft 1.17.1 Pre-Release 1, published 2021-06-18. Every entry keeps its original bug ID.

25 issues fixed, read from Mojang’s own patch notes. Each entry keeps its original bug ID.

Bugs fixed in 1.17.1 Pre-release 1 25

• MC-123654 Sun, moon, and/or clouds are not showing if render distance is below 4
• MC-131290 Enchantments are saved as shorts, but are loaded as and function with integer values
• MC-156155 Turkish lira sign (₺) appears as □ in the game
• MC-194736 Duplicate text mapping for U+00B7
• MC-196999 U+1FEC is wrong in Minecraft's font
• MC-213986 Pistons and dispensers can be used to create ghost blocks using powder snow
• MC-219018 Ghost items can be created using /item (server doesn't update client inventory correctly
• MC-223350 Loaded chunks sometimes don't render until the player moves their head slightly
• MC-225816 Hanging Roots appear large when an item entity
• MC-226461 Logs can be replaced with stone near lava pools
• MC-226948 Withers are now affected by potion effects
• MC-227387 World gen datapacks will likely crash or softlock the game
• MC-227435 Lag when placing heads of non-existent players when on servers
• MC-227483 root_system feature config's codec uses a wrong field
• MC-227520 Overworld Fossils always generate at bedrock level
• MC-227557 End portal texture appears stretched after world conversion
• MC-227618 Small dripleaf is consumed without being placed when used on tall seagrass
• MC-227651 Group for lapis lazuli ore smelting and blasting recipes is misspelled
• MC-227821 Client crash when trying to create/edit realm immediately after deleting previous one
• MC-227891 Ender pearls despawn when player logs out of a server
• MC-228219 Thrown ender pearls disappear upon entering the exit end portal
• MC-228343 java.lang.NullPointerException when random_selector default feature isn't found
• MC-228430 Very long loading pause while booting the game ("Failed to add PDH Counter", caused by oshi
• MC-228828 Specifying the --server parameter when starting the game, causes the game to crash
• MC-229299 Blue axolotls can spawn naturally

This build was part of the run-up to 1.17.1. Everything tested here landed in that release.