Minecraft wiki entry for Development_versions, associated text: Loading older worlds will no longer cause chunks to be empty (MCPE-98789).
Fixed an issue that could prevent some music tracks from playing in the Nether (MCPE-146266).
Fixed Leaf Blocks not remaining transparent when surrounded by partial blocks such as Buttons or Slabs (MCPE-139213, MCPE-53731).
Fixed face culling of the block below a Leaf Block, fixing an x-ray effect.
Fixed an issue where the Shield would get locked to the player's offhand slot in the inventory screen when opening the inventory screen while crouching (MCPE-146003).
Fixed an issue with some Marketplace packs in beta builds spawning the player in the wrong location.
Fixed a bug that could cause double chests to split and become unusable (MCPE-146983).