Facebook login Session kick-out

Can you make sure that the domain of the URL isn't changing? Sometimes, a user will be navigating your site with www. and one link on your site is hard-coded to not use www. That can change the session data within Joomla which can cause the user to not seem logged in any more.

Thats my best initial guess as to what's happening. If that doesn't help, can you tell use if you have the same issue with standard Joomla logins or other social networks (if you have others configured)?

Thanks,
Alex

I see two different sites that you've run Autotune with in the past. Can you let me know what site you're seeing this issue on and we'll gladly see if we can determine the cause by testing on the front-end.

Thanks,
Alex

As noted above, your site is accessible over www and non-www. A very possible way that the session could be invalidated is by the user going from one version to the other. For instance, the "SHOP-STARTSEITE" link at the top is hard-coded to non-www. So, if a user comes and logs in on the www site and navigates there, the session can go away. It shouldn't, but Joomla (and some servers) can not keep the session on different sub-domains.

I'd highly recommend setting up a redirect from www to non-www (or vice versa) to see if that helps. It's also better for SEO purposes.

Thanks,
Alex