The Wanderer
in paths untrodden
You actually mention two separate things.
The session duration is set to 20 minutes at the moment. If you are inactive during that period of timet your session expires. This is also used for the Who's online at the front page. It needs to be set at something. A very long time is not practical as the "who's online" will be incorrect and quite large.
An expired session requires you to login again, which can be automatic.
If you need to manually login again, you either don't allow cookies and/or you haven't enabled the automatic login option. If you do both, you will be automatically logged into the forums.
Is it because I have script blocker?
And I don't think that it takes me 20 minutes to write a few paragraphs...
I pretty sure I've set everything to allow for this place.
I'll go check my settings again just in case.