I‘m not using android, so I just found this advice: No Tags in Android App
Perhaps the system detects the missing tags and is trying to create them?
If deleting, re-installing and syncing gives you no proper database on your phone, it could help to open a new thread here in the support forum with an accurate description of your
- system,
- joplin version,
- sync-method,
- issue
to attract more competent help than mine. Good luck!