Vanishing comments in 2.0!

If comments disappear, is there a way to bring them back? Why would comments disappear in the first place?!

I am using 2.0 for a class, with a folder for each student. In that folder, they are Editors, and the rest of the class has no access at all. As an Administrator, I can see their folder and pages in that folder.

I've left some comments on their pages -- "fix this", "I like that", etc. But when they edit those pages, the comments disappear. What happened? They didn't try to remove my comments, and want to see those comments to see what changes I've recommended.

What can I do?
 
indifferent I’m hoping for a quick solution
Inappropriate?
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