DeviceActivityMonitor unreliable with iOS 17 - any other ways to schedule tasks?

We have an app that uses the Screen Time APIs to block certain apps set by the user on a schedule:

• We use ManagedSettings to shield selected apps
• We use DeviceActivityMonitor to shield the apps automatically on a schedule set by the user. The shielding starts during the intervalDidStart callback function and ends during the intervalDidEnd callback function

We are getting reports from the majority of our iOS 17 users that the app blocking schedules no longer work on iOS 17. We have tested this on our own iOS 17 devices and reproduced the behavior. But the feature still works consistently on iOS 16 devices.

The app is still built using Xcode 14 instead of Xcode 15 due to another issue - the DeviceActivityReport is blank for all iOS 16 users when built in Xcode 15 (link to issue on the developer forums: https://developer.apple.com/forums/thread/735915). When testing with Xcode 15 builds, the bug appears to improve - however it still occurs intermittently.

Are there any other mechanisms to run tasks on repeating schedules? For this specific feature, we don't need to eventDidReachThreshold callbacks, which is the main purpose of DeviceActivityMonitor. So we really don't need any Device Activity integration at all, just setting and disabling ManagedSettings shields at certain times. Would love if anyone could suggest and alternative to DeviceActivityMonitor.