When I set Alarm with fixed schedule(Alarm.Schedule.fixed(date)) LiveActivityIntent just work inconsistently it sometimes call perfrom but cannot call other's such as NotificationCenter.default.post it just work fine with relativeSchedule but not for fixed schedule i want to know why it happen tested code is under below struct StopIntent: LiveActivityIntent { static var supportedModes: IntentModes = [.foreground(.immediate)] func perform() throws -> some IntentResult { guard let id = UUID(uuidString: alarmID) else { NotificationCenter.default.post(name: .Alarm.stoped, object: alarmDataString) throw TestAlarmManager._Error.badAlarmID } Task { @MainActor in try TestAlarmManager.shared.stopAlarm(id) NotificationCenter.default.post(name: .Alarm.stoped, object: alarmDataString) } return .result() } static var title: LocalizedStringResource = "Stop" static var description = IntentDescription("Stop an alert") @Parameter(title: "alarmID") var alarmID: String @Parameter(title: "alarmDataString") var alarmDataString: String init(alarmID: UUID, alarmDataString: String) { self.alarmID = alarmID.uuidString self.alarmDataString = alarmDataString } init() { self.alarmID = "" self.alarmDataString = "" } }