didFinishMissionExecution returns immediately with error but mission still flown. about mobile-sdk-ios HOT 6 CLOSED

func actionMore() {
        let googleAnalyticsAction = "Action - More"
        GoogleAnalytics.sharedInstance.trackEvent(googleAnalyticsAction, label: "Open")
        let actionSheet = UIAlertController(title: Constants.App.About, message: nil, preferredStyle: .ActionSheet)
        actionSheet.addAction(UIAlertAction(title: "cancel".localized, style: .Cancel, handler: { (action) -> Void in
            GoogleAnalytics.sharedInstance.trackEvent(googleAnalyticsAction, label: "Cancel")
        }))
        actionSheet.addAction(UIAlertAction(title: "Test LCMC".localized, style: .Default, handler: { (action) -> Void in
            let missionManager = DJIMissionManager.sharedInstance()
            let waypointMission = DJIWaypointMission()
            if let aircraftLocation = FlightDirector.sharedInstance.telemetry.aircraftZLoc.value?.loc.coordinate {
                let height: Float = 30.0

                waypointMission.gotoFirstWaypointMode = .Safely
                waypointMission.exitMissionOnRCSignalLost = false

                waypointMission.removeAllWaypoints()
                waypointMission.maxFlightSpeed = 10.0
                waypointMission.autoFlightSpeed = 5.0
                waypointMission.finishedAction = DJIWaypointMissionFinishedAction.GoHome
                waypointMission.headingMode = DJIWaypointMissionHeadingMode.Auto
                waypointMission.flightPathMode = DJIWaypointMissionFlightPathMode.Normal
                //DJIWaypointMissionAirLineCurve
                var point1: CLLocationCoordinate2D
                var point2: CLLocationCoordinate2D
                var point3: CLLocationCoordinate2D
                var point4: CLLocationCoordinate2D
                let DEGREE_OF_THIRTY_METER:Double = (0.0000899322 * 3)
                point1 = CLLocationCoordinate2DMake(aircraftLocation.latitude + DEGREE_OF_THIRTY_METER, aircraftLocation.longitude)
                point2 = CLLocationCoordinate2DMake(aircraftLocation.latitude, aircraftLocation.longitude + DEGREE_OF_THIRTY_METER)
                point3 = CLLocationCoordinate2DMake(aircraftLocation.latitude - DEGREE_OF_THIRTY_METER, aircraftLocation.longitude)
                point4 = CLLocationCoordinate2DMake(aircraftLocation.latitude, aircraftLocation.longitude - DEGREE_OF_THIRTY_METER)
                let wp1: DJIWaypoint = DJIWaypoint(coordinate: point1)
                wp1.altitude = height
                let wp2: DJIWaypoint = DJIWaypoint(coordinate: point2)
                wp2.altitude = height
                let wp3: DJIWaypoint = DJIWaypoint(coordinate: point3)
                wp3.altitude = height
                let wp4: DJIWaypoint = DJIWaypoint(coordinate: point4)
                wp4.altitude = height
                waypointMission.addWaypoint(wp1)
                waypointMission.addWaypoint(wp2)
//                waypointMission.addWaypoint(wp3)
//                waypointMission.addWaypoint(wp4)
                missionManager?.delegate = self



                missionManager?.prepareMission(waypointMission, withProgress: {
                    [weak self] (progress: Float) -> Void in
                        print(progress)
                    }, withCompletion:{[weak self] (error: NSError?) -> Void in


                            print("starting mission")
                            missionManager?.startMissionExecutionWithCompletion { (startMissionExecutionError: NSError?) in
                                if let startMissionExecutionErrorValid = startMissionExecutionError {
                                    FlightDirector.sharedInstance.statusFlash.value = FlightDirectorStatus(disposition: .Danger, message: startMissionExecutionErrorValid.localizedDescription)
                                    FlightDirector.sharedInstance.disengage(.DJIMissionManagerError)
                                    return
                                }
                            }

                    })
            }}))