Hi, sorry for the delay, we have tried to reproduce it.
The feature did not reenable itself but after a while, there was a notification of some issues.
Clicking on the notification sends you to the scan results where you can see a message that you are not protected because the the File Shield feature is disabled. If you click resolve, the feature will be enabled automatically.
Is it possible that you misunderstood that both locations (Settings and Scan Results) are the same feature?