Parental Control profiles are constantly disappearing from the Tether app. When attempting to create a new one, it displays the error "Unable to create profile. Please try again later."
It also frequently fails to update settings when attempting to add a time slot for a specific profile. Restarting the router used to resolve the issue, but over the past week, reinstalling the app and restarting the router hasn't helped.

I also frequently see an error when attempting to use Parental Controls, where the app doesn't recognize the owner's device and asks the user to contact the owner for additional permissions.