PLEASE READ before participating in the Minecraft Beta:

• Joining the beta will replace your game with a work in progress version of Minecraft
• You will not have access to Realms and will not be able to join non-beta players while you're previewing the beta
• Any worlds played while in the beta cannot be opened in previous versions of the game so please make copies of worlds to prevent losing them
• Beta builds can be unstable and are not representative of final version quality
• The beta is available only on Xbox One, Windows 10, and Android (Google Play). To join or leave the beta, see aka.ms/JoinMCBeta for detailed instructions

Fixes

General

• New Nether biomes, blocks and structures no longer generate in worlds with a fixed version defined MCPE-66357 
• Fixed an issue that prevented players from joining Dedicated Servers 

Gameplay

• Fixed an issue that could cause tile entities in a chunk to lose their data when the chunk is loaded MCPE-78279

Mobs

• Cured zombie villagers can breed again MCPE-48533
• Mobs that are path finding will be able to get to the end of their path
• Rabbits will hop properly again when moving MCPE-74537 

Graphical

• Textures now load correctly when descending from high altitude MCPE-77490 

Add-Ons and Scripting

• Content using the player in the base pack will now swim correctly 
• Functions no longer give content log errors when using fake players with scoreboard 
• Playsounds with numbers in their names now play correctly
• Fixed issue where 'minecraft:knockback_roar' would not apply vertical knockback force