Minecraft wiki entry for Development_versions, associated text: MC-245857 – Enchanting table registers block diagonally above the bookshelves as blocking said bookshelf.
MC-245925 – Falling block visual glitch when dying with doImmediateRespawn.
MC-246465 – Lava can burn, damage, and destroy entities client-side and lead to de-sync.
MC-248095 – Active repeating command blocks stop running after world conversion to 1.18.