Minecraft wiki entry for Development_versions, associated text: MC-236610 – Lava lakes generate without stone around.
MC-236628 – Lava pools cause sand to fall now instead of putting sandstone beneath it.
MC-236652 – Weather can be incorrect sometimes within a biome.
MC-236659 – Lava lakes spawn more on the surface than usual.
MC-236803 – Extremely low amount of pillager spawns in outpost on jagged peaks, groves, snowy slopes and frozen peaks.
MC-237040 – Falling blocks still sometimes disappear for a moment when landing.
MC-237598 – Projectiles glitch around in the air when exiting simulation distance.
MC-237621 – Missing biome definitions in some peak grid cells cause unintended ocean placement.
MC-237791 – Villager spawn eggs used on grove, frozen peaks, snowy slopes and jagged peaks don't spawn snowy plains villagers.
MC-237954 – The "Sound of Music" and "Feels like home" advancements are internally located in the incorrect tab folder.
MC-238038 – Newly added advancements' namespace ID does not match its translation key.
MC-238972 – Deserts generate with little or no sandstone.
MC-239714 – Doing /locate desert_pyramid on a desert Superflat world freezes the world.
MC-239851 – Upgrading old worlds causes leaves to change to surface builder blocks.
MC-239852 – Lava pools intersecting strongholds can cause end portal frames to be deleted.