The Confluence Export to PDF functionality does not work with add-ons that generate dynamic content. When a page containing certain macros is exported to PDF the content of those macros will not show in the PDF. We have logged this issue with Atlassian https://jira.atlassian.com/browse/CONF-38112.
This currently affects these Adaptavist add-ons:
To export your Confluence page to PDF we suggest you use your browsers built in functionality until a fix is in place for this. This is how you can use your browser's print function to save webpages as PDFs.
Earlier Windows systems do not have a built in print to PDF function but you can use Adobe Acrobat or a PDF converter program by following these instructions from Digital Trends.
Alternatives to the DOPDF program recommended by Digital Trends are discussed by How To Geek in their explanation of printing to PDF in Windows.
Mac's have built in functionality to print to PDF
There are other advanced options as described by OSX Daily
This browser has its own print to PDF function on both Windows and Mac. See the Adjustable Print Settings in these instructions from Google Chrome Support.