Bookmarks in RH 9 not appearing as destinations in PDF

We have the need to jump to a midpoint in a PDF document instead of a specific page (when adding content in front of the bookmark, the page may change). I thought I could add a bookmark in RH9 and then would see the bookmark translated to a destination in the PDF, but I am not seeing any destinations in the generated PDF when clicking the destination icon in the left nav of the generated PDF. Am I doing something wrong, do I need a newer version of RH, or does this not work at all?