Minecraft wiki entry for Development_versions, associated text: Monster spawning in the Nether has been changed to more closely match Java Edition (MCPE-65762)
There will now be a maximum of 15 to 20 mobs around the player in the Nether, instead of 30 to 40
Block interaction "click" sounds are now controlled by the "Blocks" volume slider (MCPE-104983)
Swapped toggle sounds for levers so that they are now parity with Java Edition (MCPE-30379)
Pushed the Far Lands beyond the 32 bit integer limit.