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PDF file to be downloaded is not displayed when button is pressed in WKWebView in iO13Displayed with no problem on iOS12 or lower in WKWebViewWhen the download target is a text fileIt is displayed normally on iOS13.Source load location------------------------------------------------------------------------------The following methods are executed when the button is pressed.func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) guard let url = navigationAction.request.url else { decisionHandler(.cancel) return } switch navigationAction.navigationType { case .formSubmitted: webView.load(URLRequest(url: url)) decisionHandler(.cancel) return } decisionHandler(.allow) }}------------------------------------------------------------------------------ErrorMessageThe following error message is displayed.func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error)<WKReloadFrameErrorRecoveryAttempter: 0x281e9ab80>, NSErrorFailingURLStringKey=URL/XXXX.jsp?form1%3AhtmlFileTable%3A1%3A_id3.x=0&form1%3AhtmlFileTable%3A1%3A_id3.y=0&form1%3AhtmlParentFormId=&form1%3AhtmlDelMark=&form1%3AhtmlRowKeep=&com.sun.faces.VIEW=_id15%3A_id16&form1=form1, NSErrorFailingURLKey=URL/XXXX.jsp?form1%3AhtmlFileTable%3A1%3A_id3.x=0&form1%3AhtmlFileTable%3A1%3A_id3.y=0&form1%3AhtmlParentFormId=&form1%3AhtmlDelMark=&form1%3AhtmlRowKeep=&com.sun.faces.VIEW=_id15%3A_id16&form1=form1, NSLocalizedDescription="Frame Load Interrupted"}Changes to be worried about[iOS 13 Release Notes]To enhance security, URLSession no longer sniffs the MIME type when the server sends Content-Type: application/octet-stream. (7820658)From