NSURLSession does not call delegate method

Hi,

I am running below code to send request within URLSession data task, but the delegate methods are not called, but get called if I change to other url, for example "https://m1.m.dm/dp/authServices.htm".

class ViewController: UIViewController {
    
    var receivedData: Data?
    
    private lazy var session: URLSession = {
        let configuration = URLSessionConfiguration.default
        configuration.waitsForConnectivity = true
        return URLSession(configuration: configuration,
                          delegate: self, delegateQueue: nil)
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        startLoad()
    }

    func startLoad() {

        let url = URL(string: "https://m5.m.dm/dp/authServices.htm")!//delegate never called by URLSession
        let task = session.dataTask(with: url)
        task.resume()
    }

}

extension ViewController: URLSessionDelegate, URLSessionTaskDelegate, URLSessionDataDelegate {
    
    // MARK: - URLSessionTaskDelegate

    func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
        
    }
    
    // MARK: URLSessionDataDelegate
    
    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive response: URLResponse, completionHandler: @escaping (URLSession.ResponseDisposition) -> Void) {
        completionHandler(.allow)
    }
    
    
    func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
        
    }
    
}