This doesn't seem to work like the rest of ajaxed GH pieces. The title has its specific update function that just changes the textContent, making which is invisible to our new observer

u(n, '.js-issue-title').textContent = o.issue_title;

format-conversation-titles should probably be excluded from #3409 as well.

If anything, format-conversation-titles should be fixed because the title isn't re-parsed when the title is changed

#3458