I appreciate that you are a volunteer, but please stop stating that there are known limitations that will not ever be fixed. I have been using Microsoft Word for decades and am a technical writer and editor who has substantively edited close to 1000 scientific manuscripts, book chapters, grants, etc. ALL of these documents have used Track Changes and have included comments, and very often, multiple drafts and collaborators. This has NEVER, and I repeat, NEVER, been an issue for me or any of my colleagues until I first posted in the forum several months ago, nor was I able to find any mention of this issue in the forums until my post. This issue clearly has a start date; we can only hope for an end date.
There are undoubtedly hundreds, if not thousands, of people who are also experiencing this issue, but have not come to the forums or have not noticed their deleted comments. I am completely maxed out on frustration with this ridiculous problem (as I sit here, digging through comments in list view to copy, delete, and recreate a comment that disappeared from contextual view so I can waste my time finding a work around to get the comment to stay).
For me, formatting changes to the text such as italics and highlighting create the problem regularly, if not every time (I don't have time to do Microsoft's work of troubleshooting here).
Jenn