Hi,
Please see the attached Word/PDF file - you can see when the conversion happens, the header shows up twice on the PDF for some reason. I'm fairly sure this didn't happen before, but I tested several versions going back, and it wasn't able to fix it.
I am using the "Spire.Officefor.NETStandard" latest version 7.10.0. And the issue seems to happen on both Windows and Linux (our servers are linux based).
Cheers,
Felix