Why does getCurrentInterruptionFilter BroadcastReceiver work from Quick Settings but not from Settings?

I have the following Broadcast Receiver to get hold of the changes in my Interruption Filter.

public class DndBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(NotificationManager.ACTION_INTERRUPTION_FILTER_CHANGED);
        if (NotificationManager.ACTION_INTERRUPTION_FILTER_CHANGED.equals(intent.getAction())) {
            NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
            assert mNotificationManager != null;
            if (mNotificationManager.getCurrentInterruptionFilter() == NotificationManager.INTERRUPTION_FILTER_NONE) {
                System.out.println("None");
            } else if (mNotificationManager.getCurrentInterruptionFilter() == NotificationManager.INTERRUPTION_FILTER_ALARMS) {
                System.out.println("Alarms");
            } else if (mNotificationManager.getCurrentInterruptionFilter() == NotificationManager.INTERRUPTION_FILTER_ALL) {
                System.out.println("All");
            } else if (mNotificationManager.getCurrentInterruptionFilter() == NotificationManager.INTERRUPTION_FILTER_PRIORITY) {
                System.out.println("Priority");
            } else if (mNotificationManager.getCurrentInterruptionFilter() == NotificationManager.INTERRUPTION_FILTER_UNKNOWN) {
                System.out.println("Unknown");
            }
        }
    }
}

This works really well when I toggle the Quick Settings DND button, but when I turn DND on or off using the button in the actual Settings panel, no change is detected. Is there any obvious reason why this might be?

Ok, this is because my Broadcast Receiver only works when my app is in the foreground. So quick settings works, but not settings because I am on the settings screen.