Not to mention the problems of PDFs that have been mangled (sorry—handled) by Office 365. And you thought the problems of files mangled by Apple Preview was bad?
Glad I am still using Office 2011. I don't create Forms in Word or exceL and I use the Print menu > PDF > Save as Adobe PDF (Adobe's Print Driver) OR either Drop directly on Acrobat. And allow Acrobat to create the PDF then I add the for fields in Acrobat.
I do it I get around a 15 year old problem Of URL and MailTo links not working. Still have issue with if use Word to make a Word or Phrase in Word a Link By use of Insert menu > URL it still hasn't been fixed after 15 years.