I added a dialog to force the issue. I'll be removing it when I'm back in on Tuesday after the New Years, but it looks like the cookie is not being sent with every single request, or rather my server is not seeing it with every request. I used to ignore it and hope for the best, now I'm forcing you to relogin.
If you want, just hit 'esc' and the dialog will go away without a reload. But I need to fix the underlying issue somehow, which is why I'm forcing this for everybody right now.