Minecraft wiki entry for Development_versions, associated text: MC-219290 – Calcite is too quiet compared to other blocks.
MC-221656 – Creative mode obtained bucket of axolotl/tropical fish only spawns one kind axolotl/tropical fish.
MC-226926 – Emerald ore generates too often.
MC-228599 – Attempting to walk through flowing water constantly switches the player from swimming into normal mode.
MC-229191 – Diamond ore distribution changed between 1.16.5 and 1.17.
MC-229441 – You can steal the item a villager is holding for trade by killing it.
MC-229614 – Wandering Trader obtained tropical fish are only white kob.