Steps to reproduce the issue :
Happens in certain documents, not sure why.

Environment:
Adobe Acrobat Pro DC 22.001.20169

Expected result
If the document has 33 comments, I expect to see them all on opening, in the comments panel.

Observed result
On opening, only a fraction of comments is listed. E.g.: 3 comments (although the document has 33 comments instead).

If I scroll down through all pages, the missing comments gradually appear, and the number of comments (on top of the comments panel) gets updated accordingly, while scrolling down.

The comments' status doesn't seem to make a difference (whether they are plain comments, or status "Done", etc.).

Attached: such a file with missing comments on opening. The issue seems to be document-related (all users experience the issue with the same document).