iOS 11 - always opens photo library even the source type change it from .photoLibrary to .camera

The code is perfectly working in iOS 10 and below. But, in iOS 11 after cancel the photo library and open the camera its always opens the photo library. This is only happening in iOS 11.

Code is compiled in Xcode 9 Beta 4.

Code below:

@IBAction func buttonProfilePicPressed(_ sender: UIButton)
{
    let alert = UIAlertController(title: "Choose Image", message: nil, preferredStyle: .actionSheet)
    alert.addAction(UIAlertAction(title: "Camera", style: .default, handler: { _ in
        self.openCamera()
    }))

    alert.addAction(UIAlertAction(title: "Gallery", style: .default, handler: { _ in
        self.openGallary()
    }))

    alert.addAction(UIAlertAction.init(title: "Cancel", style: .cancel, handler: nil))

    self.present(alert, animated: true, completion: nil)
    imgPicker.delegate = self
    self.present(imgPicker, animated: true, completion: nil)
}

func openCamera()
{
    if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.camera))
    {
        imgPicker.sourceType = UIImagePickerControllerSourceType.camera
        imgPicker.allowsEditing = true
        self.present(imgPicker, animated: true, completion: nil)
    }
    else
    {
        let alert  = UIAlertController(title: "Warning", message: "You don't have camera", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
        self.present(alert, animated: true, completion: nil)
    }
}

func openGallary()
{
    imgPicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
    imgPicker.allowsEditing = true
    self.present(imgPicker, animated: true, completion: nil)
}

func startCameraFromViewController(_ viewController: UIViewController, withDelegate delegate:
        UIImagePickerControllerDelegate & UINavigationControllerDelegate) -> Void {

        if (UIImagePickerController.isSourceTypeAvailable(.camera) == false) {
            print("fail")
        }

        let cameraController = UIImagePickerController()
        cameraController.sourceType = .camera
        cameraController.allowsEditing = true
        cameraController.delegate = delegate

        present(cameraController, animated: true, completion: nil)

    }

This is the code that works for me. Same problem on iOS 11, but working with this. Maybe you need to remove self.present(imgPicker, animated: true, completion: nil) in buttonProfilePicPressed method.