Clicking back button from a job, only 1 job remain in list, #s=1 added to URL?

Hi,

I work on a site that uses this plugin (I didn’t install it but help with the site) and we have an odd issue.

Sometimes (but not always!) when clicking to a individual job listing, if we click the back button to go back to the main job listing, then the list of jobs suddenly only has 1 job listed!

I did notice that when this happens (which isn’t every time and seems random and not based on any particular job), then the following is suffixed to the URL:

#s=1

If I remove that and reload the page, then all jobs are back again.

Any ideas?