I’m using Iron Pdf, but there is a problem when using external fonts using imports through @font-face.
Even setting a delay on firstrender, in production it returns a blank PDF.
Would anyone have an alternative to resolve it?
Below is an example of the code that is rendering the HTML/CSS:

  try
  {
      _logger.Debug(LogContext, "start chrome render", options);
      var renderer = new ChromePdfRenderer
      {
          RenderingOptions = CreateRenderOptionsFrom(options)
      };

      if (_isFirstRender)
      {
          _logger.Debug(LogContext, "first render");
          //We need to add a delay in the render process because we are using external fonts on the template, 
          //after the first render, this does not look like a issue anymore. Link below for refence
          //https://ironpdf.com/examples/google-fonts-htmltopdf/
          _isFirstRender = false;
          #if DEBUG
          renderer.RenderingOptions.RenderDelay = 500;
          #else
          renderer.RenderingOptions.RenderDelay = 1200;
          #endif
      }

      var (first, rest) = pages;
      _logger.Debug(LogContext, "creating first page");
      var pdf = await renderer.RenderHtmlAsPdfAsync(first);
      _logger.Debug(LogContext, "created first page");
      foreach (var page in rest)
      {
          _logger.Debug(LogContext, "creating next page");
          var newPage = await renderer.RenderHtmlAsPdfAsync(page);
          pdf.AppendPdf(newPage);
          _logger.Debug(LogContext, "created next page");
      }

      _logger.Debug(LogContext, "reading stream");

      using var ms = pdf.Stream;
      var buffer = await ms.GetBufferAsync(cancellationToken: cancellationToken);
      var file = FileRaw.Create(buffer, ExtensionMap.pdf);

      _logger.Debug(LogContext, "readed stream");
      return file.AsRight<Exception, FileRaw>();
  }
  catch (Exception ex)
  {
      return ex.AsLeft<Exception, FileRaw>();
  }

I tried setting a render timer, for the first render, for loading the fonts, and before rendering the PDF, but it doesn’t work well on my local host.
I also tried to follow some steps in the documents, like this https://ironpdf.com/how-to/manage-fonts/
but we can’t update to the latest due to incompatibility with another lib