Nitro Pro 11 - converting files to pdf, file name gets changed

[Julian]

Hello,

I'm encountering the following problem when trying to convert one or mutiple .docx files to .pdf files using nitro pro 11:

In my word document I do have a FileName field on the first page of the document and on the footnote of every page. After I convert it to pdf, the FileName field on every footnote page gets changed, a number/letters gets added at the end (see screenshot). The name of the document stays the same and the FileName field on the first page stays the same, only the one on the footnote is changing (maybe it has to do with some sort of temporary file creation? but then why does it change only there and not in the first page aswell?).

Can anyone tell me how to convert them without having it change name?