Getting logged out periodically

I looked up the cookies used by Lithium and a user session is meant to last for up to 30 days best I can tell (with the appropriate option enabled), which I don't think any of us are seeing.  Maybe this is overridden by the custom login experience we have here. 

Great if Vasil's issue could be investigated and some guidance about sessions seemingly timing out sooner than expected.  I imagine it's a real turn off especially for new members, that might not have the patience to keep logging back in.

Just to add - this is what I see when logged out, here I was away for a couple of hours and ran a search when I got back from where I was last in the community.  I have to go back to the home page and sign in again, not much of a drag as what Vasil is seeing but not ideal either.