I really don't know if this is related to https, but in the last few days (not sure when it started since I'm no on ENW every week) whenever I open the forum I am apparently logged out of it... but I'm really not, because when I enter my usename without the password, it logs me in anyway. The same thing happens on my mobile phone, when I goto the main page it shows me logged out, if I e.g. click "desktop version" I am immediately logged in without having to enter credentials.
I think it might be a problem with the current cookies, but deleting them doesn't get rid of the problem, it still reappears.