Minecraft wiki entry for Development_versions, associated text: Undead mobs standing near Powder Snow now burn normally (MCPE-131005)
Powder Snow above undead mobs now prevents burning effect
Multiple Shulkers will no longer be able to spawn in the same position from spawn eggs or End City generation (MCPE-43972)
Mobs can now pathfind correctly when standing on Amethyst Buds (MCPE-130010)
Fixed Horses sometimes becoming invisible after players dismount them (MCPE-108568)
Grown up Goats no longer lose their Horns when reloading a world
Lightning no longer randomly strikes mobs that are under blocks (MCPE-121688)