mapbox direction api wrong route in ios

Question

I am using MapBox (Direction API) for drawing routes between two points. When I draw a root on the map on the Mapbox site I got the correct route, however when I use MapboxDirection API (MapboxDirections.swift) ON iOS I got a wrong route (it simply shortcuts the route instead of a turn. URL: https://api.mapbox.com/v4/directions/mapbox.driving/58.3492489633563,37.898002422381;58.3578,37.8787.json?access_token=pk .****&alternatives=true&geometry=polyline

directions!.calculateDirectionsWithCompletionHandler { (response, error) in
                if let route = response?.routes.first {
                    print("Route summary:")
                    let steps = route.legs.first!.steps

                    print("Distance: \(route.distance) meters (\(steps.count) route steps) in \(route.expectedTravelTime / 60) minutes")
                    for step in steps {
                        print("\(step.instructions) \(step.distance) meters")

                        self.calculatedTour.append(step)
                        self.calculatedTourPoints.append(step.maneuverLocation)
                    }
                    self.tourLine = MGLPolyline(coordinates: &self.calculatedTourPoints, count: UInt(self.calculatedTour.count))

                    self.mapView.addAnnotation(self.tourLine)
                } else {
                    print("Error calculating directions: \(error)")
                }
            }

mapbox site:

in my app:

Answer 1

This appears to be an unintentional over-simplification of the route.

MapboxDirections.swift master renders this route correctly, however:

Answer 2

the problem has been resolved

 for geoCoordinates in route.geometry {
       self.calculatedTourPoints.append(geoCoordinates)
   }