Yeah, it's annoying me too!
Go and make a cuppa and on your return, You're logged out, despite clicking on auto log in.
The search default of posts, not topics, is also well minging...
Doing a bit of work on the server tonight (living the dream) which would explain any issues you see today. Otherwise I've not seen that behaviour, can you let me know things like OS and browser.
I found that when looking with my phone, that when I got an email I couldnt see stuff as I needed ot be logged in (and haven't been able to remember my password...something to fix)... but discovered if you click the second link in the email, it takes you there without having to log in... not sure if that makes sense...