I had started adding comments to a long form document in Acrobat DC on Windows desktop and saved the document to my Document Cloud. Everything appeared to have synced.

Later, I accessed the same document on my Chromebook using the Acrobat app (logged into my account). The comments WERE synced and I proceeded as expected, and added more comments.

Another day, I reopened the document back on my Windows desktop machine and I believe all of the comments thus far had been synced. I proceeded through the document and continued adding more comments. Each time the document was saved, it showed that it was being saved and synced to DC.

However, when I tried to access the same document today using my Chromebook again, it appears that all of the comments from the most recent session (on Windows) were missing. I closed the document and tried reopening it, thinking perhaps it had loaded an old cached version instead -- but when I reopened the document I saw the same set of comments and the most recent ones were still missing.

Unfortunately, it seems as though that grouping of comments are now gone forever, as the document seems to have been synced again and I can see the comments from earlier as well as the comments from today, but not the comments from the previous session - regardless of whether I open the document on Windows or my Chromebook.

This is somewhat disappointing, as it means I must now re-read over 100 pages and hopefully catch all of the typos and mistakes that were noted in the now missing comments.