This seems bad, but we cannot reproduce it on our end. Can you post the raw data from about:support (help > troubleshooting information, then click 'copy raw data to clipboard', then paste in the attachment box at https://bugzilla.mozilla.org/attachment.cgi?bugid=1630860&action=enter ) ?
Bug 1630860 Comment 4 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
This seems bad, but several of us cannot reproduce it on our end. Can you post the raw data from about:support (help > troubleshooting information, then click 'copy raw data to clipboard', then paste in the attachment box at https://bugzilla.mozilla.org/attachment.cgi?bugid=1630860&action=enter ) ?