Minecraft wiki entry for Development_versions, associated text: Fixed an issue that preventing player interaction after using the '/clone' command on a double chest block (MCPE-109119).
Using the /clone command to clone a block of the same type is no longer treated as a failed operation (MCPE-83352).
Fixed players taking fall damage when opening Shulker Boxes (MCPE-105490).
Nether Brick now gives XP from being smelted (MCPE-100030).
All mobs that use a melee attack have had their ability to hit targets above and below them restored.
The target still must be within melee attack distance to be hit.
This only affects world versions greater than or equal to 1.16.210.