[itsme]

No, I don't think my issue is directly connected with the {new_page} directive. My affected ChordPro files do not contain a new_page. I only used new_page in one single file, just to see how it works.
That specific file (containing new_page) shows its first page correctly when the tablet is in landscape orientation, the page break is some lines before the new_page. The second page is empty. With the tablet in portrait orientation the file is shown as two empty pages.