I waited some time before checking again and it happened. So I come to the conclusion that it is a timeout that is logging off the customer, which is a good thing, however, the customer still sees the "welcome back xxx" on the screen. If it has an automatic time out log off, I would expect it to show as logged off instead of "welcome back xxxx". Also, the long list includes "Login" at the top of the list and also at the bottom, "Not xxx? Logoff". as though it is logged off (showing "login") and also logged in ("Not xxxx? Logoff". ) at the same time.