Attached are a Test DOCX Document and the PDF Document that was created from it by an Aspose.Words.Document Object.
TestDocument.zip (30.5 KB)
The Header Text in the PDF Document is repeated, but NOT in the DOCX Test Document.
Thanks for your inquiry. We have tested the scenario using latest version of Aspose.Words for .NET 18.6 and have not found the shared issue. Please use Aspose.Words for .NET 18.6. We have attached the output PDF with this post for your kind reference. 18.6.pdf (18.2 KB)