Minecraft wiki entry for Development_versions, associated text: The Iron Golem's legs don't swing as far anymore.
Reduced the melee attack range of mounted mobs (MCPE-48539).
Fixed a bug that sometimes prevented mobs from burning on bottom-half slabs (MCPE-32822).
Turtles now lay eggs correctly (MCPE-59043).
Guardians can now spawn in bubble columns (MCPE-37671).
Fixed a bug that caused Vex mobs to move too slowly when moving on X and Z axes (MCPE-41879).