I play on a Samsung Galaxy A56 5G. And recently I've been experiencing a bug in some addons that corrupts my worlds after I close the game. Whenever this happens, I'm forced to always download the addon again for it to work normally.
These bugs mainly happen with the two addons I use the most: “Better on Bedrock” and “RealismCraft”.
The message that appears is: “This package is missing!”. Even though the addon is installed, it doesn't appear as installed when I try to add it to a world, it's as if it had never been downloaded to my device.
This issue is being tracked at MCPE-222906.