Bug 1928501 has some JS updates to set `hasDescription` based on if there's content in the description attribute or the description slot which may be helpful
Bug 1931059 Comment 1 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
This is an unfortunate consequence of attributes being optional, even though the label is not really optional. If this happens, then we should fix that in fluent or in the design, since the label should definitely be required