const string input = @".\\comment_spanning_pages.docx";
var output = Path.GetTempFileName();
var doc = new Document(input, new LoadOptions());
doc.Save(output, SaveFormat.Pdf);
Thanks for your inquiry. We have tested your provided document using the latest version of Aspose.Words 18.12 and found no issue. Please make sure you are using the latest version of Aspose.Words for .NET 18.12 . Also, please use the following code to save output PDF.
const string input = @ ".\\comment_spanning_pages.docx";
var output = Path.GetTempPath() + "output_18.12.pdf";
var doc = new Document(input, new LoadOptions());
doc.Save(output, SaveFormat.Pdf);
Please check document for your reference. output_18.12.pdf (26.1 KB)