I use App Groups to share UserDefaults data between my host app and DeviceActivityMonitor extension.
On iOS 17, it appears that reading @AppStorage variables are causing my DeviceActivityMonitor extension callback functions to crash. Weirdly, writing values is okay.
I see this in the extension logs:
Couldn't read values in CFPrefsPlistSource<0x10fe251d0> (Domain: GROUP_NAME, User: kCFPreferencesAnyUser, ByHost: Yes, Container: (null), Contents Need Refresh: Yes): Using kCFPreferencesAnyUser with a container is only allowed for System Containers, detaching from cfprefsd
However, through searching this log message on the internet and the fact that it also appears in my host app logs without crashing, this seems to be a warning - possibly indicating an issue but also a possible red herring.
But the fact remains that when I don't read UserDefaults values or variables decorated with @AppStorage in the DeviceActivityMonitor extension, everything works fine.
Are UserDefaults, and specifically @AppStorage decorators supported in the DeviceActivityMonitor extension?
