UIPrintPageRenderer hangs app after iPhone update

After updating iPhone from 17.4 to 17.5.1 UIPrintPageRenderer completely hangs app when getting NumberOfPages from Renderer.

var render = new UIPrintPageRenderer();

if (webViewPages != null && reportIndex < webViewPages.Length) { render.AddPrintFormatter( webViewPages[reportIndex].ViewPrintFormatter, 0); } else { render.AddPrintFormatter( new UIMarkupTextPrintFormatter(reportContent), 0); }

      var printable = CoreGraphics.CGRectExtensions.Inset(page, 0, 0);
      render.SetValueForKey(NSValue.FromCGRect(page), new NSString("paperRect"));
      render.SetValueForKey(NSValue.FromCGRect(printable), new NSString("printableRect"));

      var pdfData = new NSMutableData();
      UIGraphics.BeginPDFContext(pdfData, page, null);

      int pageNum = 0;
      for (pageNum = 0; pageNum < render.NumberOfPages; pageNum++)
      {
          UIGraphics.BeginPDFPage();
          var bounds = UIGraphics.PDFContextBounds;
          render.DrawPage(pageNum, bounds);
      }

UIGraphics.EndPDFContext();