Facing similar issue with WKWebkit. After few hours of resuming the app, the cookies are getting cleared automatically. I am using below code - let webConfiguration = WKWebViewConfiguration() webConfiguration.websiteDataStore = WKWebsiteDataStore.default() let contentController = WKUserContentController() webConfiguration.userContentController = contentController webConfiguration.allowsInlineMediaPlayback = true webConfiguration.preferences = preferences webKitView = WKWebView(frame: webContentView.bounds, configuration: webConfiguration) Please suggest what to do ?