By commenting out the elements in the linked post above, enables the page-break to work. I added a “supplemental” field (Text Editor) in the form customizations and in the custom print format, I check if the supplemental field contains a value. If it has a value, I provide a page-break and output the supplemental field. Which is exactly what I needed. However, I have to change the “core” print template as in the post (link) above.