Hi there: An update on the situation: apparently, one thing that activates the bug is remove/delete a highlight and save. In other words, last I checked (10 min ago)  the tags were still there after a mere highlighting and saving. But once I remove a highlight and save, my finder tags vanish right away! Finally, I think I sent you (or someone) an email, but so far no reply. Please let me know again how I can send you a sample pdf (but FYI, the pdfs I use are standard academic articles, nothing fancy; I've tested quite a few pdfs, all with the same result). I'm currently running the latest version (18.11.20038.267465), yet the issue persists: please do something about this very annoying bug! Best, Poldy ... View more

Hi there: I know this is rather late, but a note for posterity: before rushing to uproot files under the "preference" folder, try removing the deleted/uninstalled adobe files from "trash" as well. Best, Poldy ... View more

Hi Akanchha: Thanks for your response. I installed the Reader after I'd already updated my OS to High Sierra—so I can't speak to its behavior prior to the High Sierra update. I have tried this on multiple PDFs and I get the same result each time after annotating and saving, the PDF file loses its finder tag. There is no "Repair Installation" under Help in my version of Adobe Acrobat Reader DC. Having just updated Reader DC again (2018.009.20044), the problem still persists. Best, Daedalus ... View more