Minecraft wiki entry for Development_versions, associated text: Iron golems no longer spawn when mob spawning is disabled.
Rain, smoke particles, and shadows are no longer visible through lava.
Disabling "Visible to LAN Players" for one world no longer disables it for all worlds.
Buttons cloned in a "pressed" state no longer remain pressed forever.
A warning now appears instructing not to close the game when exporting a world.
The power output of redstone comparators is no longer lost after a world is converted from Xbox One Edition.
Pick Block no longer replaces the item currently selected in the hotbar if other slots are empty.
Increased stability and fixed several crashes.
Abandoned mineshafts no longer generate above ground.
Fixed improper mushroom block obtained from giant red mushrooms when using Pick Block.
Tools now work properly and no longer shake in-hand.
Sticky pistons no longer turn into regular pistons after being renamed.
Tripwire hooks once again appear in jungle temples.
Players can once again stand on top of ladders.
Mob heads can no longer be duplicated by placing them in water.
Strongholds once again generate with mossy stone brick and cracked stone brick.
The maximum render distance on Xbox One X is once again 22 chunks.
More than one line of text can once again be placed on signs.
The B button no longer has to be pressed twice on the controller to deselect a skin in the Skin Picker.
Heads and skulls that are placed on a wall no longer have incorrect hitbox positions.
Invisible vines no longer appear on jungle trees.
Torches can once again be placed in the same block occupied by a player.
The player now descends more slowly in water.
Fixed world updates occasionally not rendering.