The h1 heading just says "Topic on Talk:<Flow board name>", the same title as viewing the Topic itself.
It should be something like
"History of Topic on Talk:<Flow board name>"
or it could be
"History of Topic <topic title> on Talk:<Flow board name>"
+ Is more useful.
- Doesn't match the Topic page heading (which doesn't include the topic title because it's repeated in the topic titlebar immediately below).
- Contains two titles so is very likely to run onto many lines.
Meanwhile the HTML <title> tag is just the topic title. It lacks "History of Topic" in front and the usual " - <name of wiki/tagline of wiki>" that OutputPage:setTitle() gives normal pages when it calls setHTMLTitle() wit the 'pagetitle' message key.
Other pages for Flow actions such as viewing a diff also lack an indication of the action in the h1 heading and <title>. If we can get the principle right for one topic action, we can probably get it right for all.