I have a Google Doc where it has two hidden sections, "Issued by" and "Representative". Their headers are visible in the automatically-generated table of contents. However, the sections themselves are hidden and don't even show in the document outline nor print preview. But, after downloading the file, the hidden content shows up in the preview.
How can I edit or remove the headings in the ToC?
Note: I think it was done with PandaDoc (an add on). But, even after opening the file with PandaDoc I still couldn't see the hidden