For some reason the admin keeps popping up the session timeout box, it seems after about a minute, even thought I can clearly see in my sessions that they have ages until expiry.
See -> https://www.dropbox.com/s/egfg019cruv3uzn/Screenshot%202015-09-11%2009.39.21.png?dl=0
Also strangely when I refresh the page I'm still logged in. What would be causing this. The site is running on nginx if that would make any difference.
