Minecraft wiki entry for Development_versions, associated text: Fixed some sleepwalking villagers.
Mobs can now path their way through waterlogged blocks, such as seagrass. (MCPE-37005)
Wither skeletons and guardians once again spawn in the world. (MCPE-42922)
Updated supply values for various villager trades.
Wandering traders no longer change their offers after exiting and re-entering a world.
Iron golems that spawn in a village now retaliate against attacking players.
Improved ravager pathfinding.
Villagers now take breaks every once in a while.
Pillagers no longer float in mid-air after killing a ravager with a riding pillager.