"Sign in" doesn't work on doc.qt.io

Clicking on "Sign in" from http://doc.qt.io takes me to https://account.qt.io/login where I can successfully sign in. Navigating back to doc.qt.io (even using https) shows no indication that I'm signed in (the "Sign in" link is still displayed even after page refreshes and clearing cache/cookies).

I understand that at some point users with enough points etc. are trusted to make notes and possibly other edits on the doc pages so it makes sense that account functionality would be active there. Even if such edits are not allowed, it's rather confusing/misleading to not have login status displayed after successfully logging in.