This is a bug in online-accounts. I just verified on my phone with Untappd.
When uninstalling the application, online-accounts is somehow triggered and deletes the account, as there are no more applications currently using it. This is in error, as uninstalling an app should not delete user data, of which the account is. I think this is a regression too, as I don't remember that it used to do this. If the UI is unable to display an account because the plug-in is no longer available, that is fine, but I don't think it should be deleted from the database.
This is a bug in online-accounts. I just verified on my phone with Untappd.
When uninstalling the application, online-accounts is somehow triggered and deletes the account, as there are no more applications currently using it. This is in error, as uninstalling an app should not delete user data, of which the account is. I think this is a regression too, as I don't remember that it used to do this. If the UI is unable to display an account because the plug-in is no longer available, that is fine, but I don't think it should be deleted from the database.