A new version of the Arlo mobile app for iOS is now available resolving several issues with Geofencing, please make sure you have the latest version of the mobile app installed and take a look at the release notes here: Arlo iOS App - 2.12 - 13th December 2019
Thanks James for the update. Great to hear that Arlo have finally sorted this out.
But the update also states:
"Direct Storage Access (requires SmartHub and a third-party storage device): Advanced users can access recordings saved locally to their SmartHub directly within the Arlo app. Enable Direct Storage Access in SmartHub Settings > Storage Settings."
I don't see this option in the latest version of the app.