Minecraft wiki entry for Development_versions, associated text: The "We are being attacked!" and "I've got a bad feeling about this" achievements can now be unlocked. (MCPE-45060)
Powered rails placed using /fill should now work correctly when powered by redstone.
Fixed a download loop after purchasing certain content packs.
Using /setblock on a piston base no longer leaves an invisible piston arm.
When the player deletes a global resource pack, it now removes itself from the active stack.
The info at the top of the global resource pack screen now fits correctly when using various language settings.
Cloned active mob spawners now have an animated mob when placed. (MCPE-23106)
Fixed the "Multiplayer Restricted Skin!" error message that would pop up when trying to join a world before the skin had loaded in. (MCPE-48494)
Fixed an issue that was causing many small and empty villages to be created when trying to expand an existing village.
Fixed an infinite loading screen when opening the skin picker.
Fixed a missing armor layer for the "Tiny Footprints" Marketplace pack.