I am building an application for modifying and creating annotations using the Embed API. Everything seems to work just fine, except for when I export the pdf data as an XFDF the updated annotations are not present. I have attached a video to show the behavior but had to compress it significantly, here is a breakdown of what happens:
I would expect the behavior to be the same for both the Embed API and the Adobe Reader.
Can you share the PDF files from step 5 and 9? I'll also try to reproduce with my own file.
I wouldn't be surprised if Reader drops annotations that aren't 100% what it is expecting but that's why I wanted your file and my own test. It's possible that the PDF creation tool has something to do with it. Thanks for the file.