After saving a new version of a wiki page, you see the new version of the page with a message at the top that says:
For my instance in the Pcal wiki, I finish editing the wiki and arrive at this page:
https://awiki.ligo-wa.caltech.edu/aLIGO/pcalWiki#preview
If I click through a link and come back, I get popups.
But if I go through the normal wiki page:
https://awiki.ligo-wa.caltech.edu/aLIGO/pcalWiki
...everything works as expected.