Until recently I've stayed pretty much constantly logged in to MN when using my phone (IPhone, Safari). Suddenly it's started demanding I log in with email address and password every time I switch on (and often just after a pause or doing something else on the phone). This is despite the "keep me logged in" box being ticked every time. I don't post often and I can browse without being logged in but it's annoying losing my settings so I can't see op in a different colour for example. Is there a reason this has happened, or anything I can do about it?