On mediawiki.org, moderated topics still have an active Reply button in their titlebar. You can't reply to a hidden/deleted/suppressed topic until you restore it, so the button should be hidden or disabled. Clicking the button does nothing.
I think the back-end knows that Reply is not available, because the Reply link for a moderated topic has no href. But it seems flow_topic_titlebar_content.handlebars always shows a reply link.
Version: master
Severity: normal