Minecraft wiki entry for Development_versions, associated text: MC-177099 – Zoglins lock on targets and don't pick another target if target is unaccessible.
MC-177361 – Villagers/wandering traders do not flee away from zoglins.
MC-180867 – Jukeboxes grabbed with an NBT+ picker do not release discs on right click.
MC-181605 – Right-clicking a respawn anchor with an item in off-hand uses that item.
MC-182119 – Game mode description text is no longer centered and now extends off the screen in some languages.
MC-182880 – Fish spawn rates are too high in rivers.
MC-183469 – Mobs do not pathfind around holes or lava.
MC-185777 – Shift-clicking a netherite ingot in a smithing table moves the ingot to gear slot.
MC-186206 – Water tinted rendered differently behind glass top versus sides.
MC-187568 – Entity hitboxes render in front of them when graphics setting is set to fabulous for some users.
MC-187986 – Setting spawn point using a non-fully charged respawn anchor while holding a non-glowstone block in the main hand causes placed block to disappear temporarily.
MC-188468 – User control for "Swap Item with Offhand" gets reset when upgrading from 1.16-pre2 to pre3.
MC-188489 – "Switch item with offhand" inventory keyboard shortcut still works in “Search Items” creative tab, overriding text input.
MC-188505 – Attacking an entity while sneaking cancels sneaking for a moment, then desyncs client and server about player's height.
MC-188509 – Zombified piglins drop experience but not gold ingots when they die while aggressive.
MC-188542 – Custom world gen settings causes minecraft to crash upon import.
MC-188633 – Small mobs drown while in a boat.
MC-188652 – Gamerules doMobLoot and doTileDrops have the same description in gamerule menu.
MC-188655 – Number keys in Creative search override typing in the search bar, resulting in unintentional hotbar item switching.