On some stage sites, to fix this issue you must edit the TopTabs.vm file directly to point to the production site URL.
On some stage sites, some of the TopTabs links (tabs at the top of the page, such as Help or support) point to the production site instead of to the stage site. This can cause problems if stage site users find themselves on the production site, thinking they are still working on the stage site.
<$element><a href="https://support.domain.com/">Support</a></$element>
<$element><a href="https://support.stage.domain.com/">Support</a></$element>