The more our team is working within Fibery, the more we are coming across this issue. When text is changed/removed in a rich text field, any comments there are unlinked, ending conversations being contained in that comment. This has been pretty disruptive, especially for less tech-savvy people who think the comments are completely lost.
It would be nice for some alternative behavior. Perhaps the chat bubble icon still appears to the right. Or perhaps an architect/editor can relink the comment thread to new text. Ultimately, it would be very nice for some way to continue to engage with the comments.