Thanks for your inquiry. We will appreciate it if you please share your sample HTML here. We will test it at our end and will provide you information accordingly.
Thanks for sharing your source HTML. We have tested the scenario with latest version of Aspose.Pdf for .NET 10.4.0. We are unable to notice the margin issue but text is displaced. So we have logged a ticket PDFNEWNET-38762 in our issue tracking system for further investigation and resolution. We will notify you as soon as it is resolved.