We still need access to cookies – the new “remember me” is based on the old code in that a unique key is stored in your cookies that is used to identify you and automatically log you back in. The cookie expiration is set for 1 year and will be extended to 1 year each time the auto login via “remember me” takes place. So if your session expires here in 2 days and you have the remember me cookie you’ll be auto logged in and the cookie’s expiration will be reset to expire in a year again. (basically this cookie shouldn’t ever reach it’s expiration date)
If you log in from multiple devices and select remember me on each of those devices and then decide to log out on any of them then the remember me cookie will no longer be valid for any of them.
It’s possible that IE isn’t liking the year long expiration date or perhaps some security/privacy software is clearing your cookies? When I was testing the remember me function on staging the only issue I had was that I couldn’t log out after logging in with “remember me”. Every time I tried to log out it would log me back in. (super remembered lol)
I fixed that so I could actually log out on purpose. I’ll run some extended tests with IE 11 on my laptop and see if I have a remember me problem there. Everything is tied to that cookie remaining stored in the browser so if that gets cleared we have nothing to work with.