In addition to all the troubleshooting steps presented in FAQ 162
, there is one possibility that hasn't been specifically addressed: the "Allow for session" cookie permission setting. I've occasionally seen requests where the user is confused as to why their cookies expire after they close their browser, even though they have set the "Remember Me" login option.
The session-expiry cookie setting isn't exactly the most intuitive one to nail down as a possible cause of problems with remaining logged in. I was thinking that maybe it could be briefly mentioned in the second bullet point of the FAQ. Or else, it could be mentioned in the one about "Remember Me," explaining that it won't maintain your login between browser sessions if your cookies are set to expire when you close your browser.
I hope this makes sense. Thank you!