We have tabs across the top of Prismic for each section of our reviews. Clicking each section, such as 'review #1' used to take you to a new section, but now it just loads the front page each time (except for the 'specs' and 'colours' tabs as seen in the video below).
Having the same issue, we've got tabs on a custom type that are not loading the correct content when clicked. I can see the query parameters updating but like @darren.cassey mentioned the page builder is not loaded with tab data.
Update - looks like this issue has been resolved for us.
Thanks for letting us know! This was due to an issue caused by special characters in tab names. This should be fully resolved now, let us know if you're having any further problem.