(Also by bug 1976507. Where this is a binding issue, the issue had to be fixed in both the conventional and new compose toolbar.)
Bug 1978676 Comment 3 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Also, by bug 1976507. Where this is a binding issue, the issue had to be fixed in both the conventional and new compose toolbar. Bug 1976032 was conventional. Bug 1976507 was compose.