Two Progresses Appear in wkwebView

class DetailViewController:UIViewController {
    
    private var wkWebView —WKWebView!
    
    let progressView=UIProgressView (progressViewStyle: .default)
    
    private variableProgressObserver —NSKeyValueObserver?
    
    override func viewDidLoad(){
        super.viewDidLoad()

        setupWebView()
        load()
        setupProgressView()
        setupEstimatedProgressObserver()
    }
 


    func setupWebView() {
        letwebConfig=WKWebViewConfiguration()
        wkWebView = WKWebView (frame:.zero, configuration:webConfig)
        wkWebView.uiDelegate=self
        wkWebView.navigationDelegate=self
    }


    private func setupProgressView(){
        guardlet navigationBar=navigationController?.navigationBarelse {return}

        progressView.translatesAutoresizingMaskIntoConstraints=false
        navigationBar.addSubview(progressView)

        progressView.isHidden=true

        NSLayoutConstraint.activate([]
            progressView.leadingAnchor.constraint(equalTo:navigationBar.leadingAnchor),
            progressView.trailingAnchor.constrain(equalTo:navigationBar.trailingAnchor),

            progressView.bottomAnchor.constraint(equalTo:navigationBar.bottomAnchor),
            progressView.heightAnchor.constrain (equalToConstant: 2.0)
        ])
    }
    
    private func setupEstimatedProgressObserver(){
        estimatedProgressObserver=wkWebView.observe(\.estimatedProgress, options: [.new]){[weakself] webView,_in
            self?.progressView.progress=Float(webView.estimatedProgress)
        }
    }
}


// MARK: - WKNavigationDelegate
extensionDetailViewController:WKNavigationDelegate{
    
  
    // Read Ready Start
    funcwebView(_webView:WKWebView, didStartProvisionalNavigation!){
        if progressView.isHidden{
            progressView.isHidden=false
        }

        UIView.animate (withDuration: 0.33, animations: {
            self.progressView.alpha=1.0
        })
        print("Read Ready")
    }

    // Read Complete
    func webView(_webView:WKWebView, DidFinish navigation:WKNavigation!){
        UIView.animate (withDuration: 0.33,
                       animations: {
                           self.progressView.alpha=0.0
                       },
                       completion: {isFinished in
                           self.progressView.isHidden=isFinished
        })
        print("Read Complete")
    }
}