twos settings with app group issue

I have a tvos application and a topshelf extension that share NSUserDefault settings via an App group.

I instantiated the user defaults in the following manner let userDefaults = NSUserDefaults(suiteName: "group.xxx.xxx.xxx")!

Everything works as expected; settings are shared between the app and the top shelf extension.

However I have not been able to get the Settings App to work with the app group.

I have created a key in the Root.plist of my settings bundle called ApplicationGroupContainerIdentifier with the app group name, but that does not make work.

The Settings App does not see values entered by the application or vice versa.

I tested using the standard way of instantiating the userdefaults: userDefaults = NSUserDefaults.standardUserDefaults()

That works but of course then the topshelf extension does not share any settings with the app.

I would appreciate any help.

Maybe the Settings App in tvOS doen not support app groups yet, I don't know.

Thanks for any help