I also do not like that the session is so short
the session can be held for days if you do not leave the exchange, otherwise your account is at risk while you are away
what days? there is the expense... 15...30 min or an hour, I won't lie.
as with all major sites with billing, we have a session lasts 3 minute after the end of your activity. as you have already noticed, the session can hold as much as you want if you are inside the exchange , and at the moment there is a conflict of scripts on the main page of the exchange, just do not go to the main page, then the session will not fly