Apple Notes not syncing PDF annotations/markup across devices
I've imported PDFs into my Notes and am marking them up in Notes on my iPad. However, the markup doesn't sync when I open the same note on my iMac or iPhone. Other notes sync without problems. When I share the PDF from Notes via AirDrop, the shared PDF does not have the markup, either.
All my devices are up to date, so that's not the issue.
Same thing with markups I've done on the iMac. They don't sync on my other devices, either.
Thoughts?
iPad 2, iOS 9