1.15-pre2: Get pushed off of soulsand, pathblock, and farmblock

On Mac, launcher process uses 100% CPU after game is launched

Piston head should not convert farm or path block to dirt

Piston pushing end rod (etc.) onto path block should not convert it to dirt

Hostile mobs in lazy chunks no longer count towards mob cap, breaking mob switches

Villagers and iron golems count towards passive mobcap, breaking passive mob farms

"Encountered an unexpected exception" when loading 1.13.2 test world (Fine-Structure)

Villager AI (POI detection) pegs CPU at 100%

Bell doesn't ring if shot by projectile

Null pointer error in woodland mansion, maybe related to vindicators

Permanent lighting glitch in woodland mansion; fully enclosed room gets sky light

"/gamerule commandBlockOutput true" doesn't make command block output appear in server log

1.14 snapshot server always crashes after slightly more than one minute, fresh start, no users online

Main thread uses 100% of one CPU core when no users are logged in, busy-waiting over java.lang.Thread::yield, makes it hard to profile properly

AbstractMap::hashCode accounts for substantial CPU overhead (from profiling)

Extended sticky piston at border of unloaded chunk gets stuck permanently extended

Various duplications, deletions, and data corruption at chunk boundaries, caused by loading outdated chunks — includes duping and deletion of entities/mobs, items in hoppers, and blocks moved by pistons, among other problems

When exiting villager trading UI, items left in interface are dropped on the ground

Launcher with "Keep launcher open" and/or "Open output log" crashes on game exit

World.updateEntityWithOptionalForce has sense of "forceUpdate" reversed.

Blocks take multiple attempts to mine

Sticky pistons, slime blocks, and other blocks being moved may disappear when chunks load/unload

Minecraft uses excessive CPU time and electrical power when idle, not in focus, and/or completely invisible

Haste II does not insta-mine when shift-holding on ladder

New crafting recipes don't appear until you close and open the interface

Enter/exit nether, server reports: <player> moved too quickly

Easily reproducible situation where regular mouse pointer stays on screen when it shouldn't

Crafting bonemeal: Should default to bones, not bone blocks as source

Server side exception, array out of bounds in FutureTask.java

Server crash "Description: Exception in server tick loop"

Popup instructions for new players invasive for experienced users

Shift double click to move all items of the same type hit-or-miss

Login session expires too quickly

Hopper/comparator/locking race condition prevents unlocked hopper from receiving item

Launcher 2.0.849 crashes on game exit

Starting server, getting format specifier error

Crafting black dyed wool crashes Minecraft client

When Minecraft crashes with exception, "View crash report" doesn't do anything.

New crafting interface deletes items from crafting table

Dirt blocks hoppered into top or side of furnace disappear forever.

No chickens spawn in any biome

Regular mouse pointer stays on screen after Command-Tab back to 1.12 snapshot

"Open to LAN" doesn't work on Mac

"Purchase with Discover" doesn't redirect to Discover

Credit card errors not specific enough

Inadvertently saving/overwriting saved hotbars due to stuck modifier key

Legacy: "Play" for "Existing User" never works

Shift-double-click on any kind fish only moves the first kind of fish you moved while that chest is open

XP orbs won't go up onto carpet

Minecraft always goes into F11 full-screen by default, can't make that not happen