Storage got cleaned when updated existing app from playstore: ionic 4

Hi,
I have launched app before one month.
Now uploaded update for same app. I used to update the same application from playstore.
Application was installed properly.screens are ok.The issue of storage raised.I could not see any thing blocks associated with stored in cache.
I have not cleared cache. still issue facing.
Please help me out.

Did you find a reason for this behaviour happened?
I have faced the same issue, and couldn’t specify the reason.
user stored data removed and user must log again to app.

This can happen especially if you use the browser storage (Local Storage, etc.).
You should use a SQLite plugin.

We use ionic storage from ionic/storage from the beginning of app development and app updated a lot of times and we faced this issue after latest update.
Is this issue related to opt in app integrity, removing unrequired permissions like manage file access and changes in file system?