After a week struggling, I found a way to make it work. Posting here in case anyone need. #1 Have an instance of processPool and wesiteDataStore.nonpersistent() (make them a global variables if you want to get the Cookies outside of webview didFinish navigation of the same wkWebview) #2 Create an instance of wkWebviewconfigure with these two: var wkWebviewconfigure: WKWebViewConfiguration = WKWebViewConfiguration() wkWebviewconfigure.processPool = myProcessPool wkWebviewconfigure.websiteDatastore = myWebsiteDatastore // <--- have to be nonpersistent type #3 Generate webview from code with this wkWebviewconfigure, assigning wkWebviewconfigure to your wkWebview.configuration from .xib and storyboard will not work

I already implement with singleton WKProcessPool and pass here when initialize this WKWebviewViewController. Here is a sample logic I used to check the cookies from an website url after it finishes the navigation, cookies does not there import UIKit import WebKit class WKWebviewViewController: UIViewController, WKUIDelegate, WKNavigationDelegate {   var urlToLoad: String = "&lt;any website url, I even try with apple.com&gt;"   var cookiesTxt: String! var processPool: WKProcessPool!   var wkWebviewconfigure: WKWebViewConfiguration = WKWebViewConfiguration()   var webView: WKWebView!   override func viewDidLoad() {     super.viewDidLoad()     // webView programatically     let bounds = self.view.bounds     let frame = CGRect(x: bounds.origin.x, y: bounds.origin.y + 100, width: bounds.width, height: bounds.height)    wkWebviewconfigure.processPool = processPool     self.webView = WKWebView(frame: frame, configuration: wkWebviewconfigure)     self.view.addSubview(self.webView)     webView.navigationDelegate = self     webView.uiDelegate = self     if let url = URL(string: urlToLoad) {       let request = URLRequest(url: url)       DispatchQueue.main.async {         self.webView.load(request)       }     }   }    public func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {     let httpCookieStore = webView.configuration.websiteDataStore.httpCookieStore     httpCookieStore.getAllCookies { (cookies) in       print(cookies) // <--- not getting all the cookies most of time here, but sometime it works     }   } }

I have same issue, do we have any updates/work around for this issue ?