Minecraft wiki entry for Development_versions, associated text: MC-102607 – Villagers don't run away from zombies during the day.
MC-102614 – Able to paste invalid characters into structure blocks.
MC-102679 – Villagers are attacked by husks, but they don't run away from them.
MC-102740 – Teleporting players with relative coordinates behaves like before 16w21b when used in a command block [minecart].