Michael, I had much the same experience as you, but on Chrome. At this point I do find myself logged out whenever I clear my browser cookies, which i do about once a month or so. This is to be expected. Normally I'm on my Win desktop and i seem to stay logged in, but often when i go on my other devices a couple times a week (ipad, android phone, macbook) i'll find I'm not logged in by default. I think that's probably normal and is no big deal for me.
Keith, I suggest that you ask those particular users whether they are on Mac/windows/iOS/android and ask them what browsers they are using. This would give you an overview on where the trouble might lie. Knowing the pattern of where this is occurring would be very helpful.
If you find that most of them are on a particular browser, then download that browser yourself and do some testing with it to see if the same thing happens to you. Go through that browser's settings to see if there's a setting like "Clear site cookies on closing browser" or other settings that might be effecting things for those users. Find out if those users are either turning off their computer and/or closing their browser every time they walk away from the internet.
When this happens to an occasional member of mine, I usually find they are doing something that forces site log offs. My members tend to be older and it's often difficult to get them to investigate their own computer problems and settings. Sometimes there is only so much i can do for them if the issue is on their end or is a browser issue.
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...just another satisfied Jamroom customer.
Migrated from Ning to Jamroom June 2015
updated by @strumelia: 04/28/17 07:56:01AM