Addon was updated, drop rates were changed a bit, now it's harder to get precious items, and explosions happen quite often. I advise you to destroy them from a distance, usage of a bow will make the process of testing your luck much safer. But don't try to break the blocks in Creative mode, it will never drop anything.
Also, check out the lucky block race map. It utilizes the addon in a peculiar way to create a fun-to-play game mode.
How to install addons:
- Download the addon straight from your device
- Find and open the .mcpack or .mcworld files that you download earlier
- Click on it to start importing into Minecraft Pocket Edition
- Open the game
- Create a new world or edit an existing world
- Scroll down to the Add-ons section and select the ones you want to apply
- Make sure to enable "Experimental" game features in the world settings