Map Annotation closure does not seem to be excuted if annotationItems' id remain the same

I have a Map in in my view as following:

Code Block swift
         Map(coordinateRegion: coordinateRegion, annotationItems: mapsVM.coordinates) { coordinate in
          MapAnnotation(coordinate: coordinate.coordinate, anchorPoint: CGPoint(x: 0.5, y: 0.5)) {
            Circle()
              .strokeBorder(Color.red, lineWidth: 10)
              .frame(width: 20, height: 20)
          }
        }

and I have a ObservableObject in this view struct

Code Block swift
@ObservedObject var mapsVM: MapsVM

MapsVM has a property:

Code Block swift
   @Published var coordinates: [MapCoordinate]

which was used as annotation item. And its first element is used to be the center of coordinateRegion.
Map Coordinate is as following:

Code Block swift
struct MapCoordinate: Identifiable {
  let id: Int
  let latitude: Double
  let longitude: Double
  var coordinate: CLLocationCoordinate2D {
    CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
  }
}

The weird thing happens. When I set the coordinates in mapsVM, which will publish and redraw the view.

Code Block swift
coordinates[0] = MapCoordinate(id: 0, latitude: newLatitude, longitude: newLongitude)

The map region gets updated but the annotation never gets added:

Code Block swift
Map(coordinateRegion: coordinateRegion, annotationItems: mapsVM.coordinates)

is called again, but its trailing closure

Code Block swift 
{ coordinate in
          MapAnnotation(coordinate: coordinate.coordinate, anchorPoint: CGPoint(x: 0.5, y: 0.5)) {
            Circle()
              .strokeBorder(Color.blue, lineWidth: 10)
              .frame(width: 20, height: 20)
          }
        }

was never invoked again. This causes the map only updates the region but never adds the annotation. Then I found a solution: if I set the id of MapCoordinate to UUID:

Code Block swift
struct MapCoordinate: Identifiable {
  let id = UUID()
  let latitude: Double
  let longitude: Double
  var coordinate: CLLocationCoordinate2D {
    CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
  }
}

The annotation gets updated correctly now (each coordinates array assignment replaces it's first element with a new MapCoordinate, hence each assignment result in new UUID). Is this a bug? If the annotationItem's id remian the same, the Map view simply does not update the annotations.