A family of Microsoft word processing software products for creating web, email, and print documents.
Hi.
I have tried to find the reason fro this behavior, and posted a suggestion Oct 22nd.
In short, comments do not show "inline" when the text that the comments are linked to certain tracked changes (e.g. formating change). I.e. MS Word cannot handle both a comment and a tracked formating change to a word/text, and prioritize the tracked change and "remove" the comment from inline view.
This error can easily be reproduced by typing some text, make a formatting change to one word, and then add a comment to the same word. A soon as you submit the comment it "disappears" - although it can be found in the list view. Note that other changes to the text, like spelling etc, does not cause the problem.