Those in power to remedy the problem can most efficiently be contacted via the link at the bottom of every page that says 'CONTACT US'.
This section of the forum is actually very low traffic as I have seen over the past 3 yrs.
Whenever I have used the link at the bottom of the pages as described here, I have also always gotten a reply either from the moderators, or the Admins, yes, they are in fact different groups, and I think that that Admins are the only folks that can control this function of timeout.
I also have no problem with timeout, and use lastpass as well on Firefox on Xubuntu Linux.
You might want to check and see if you have a browser extension installed or other program that does auto-delete of cookies, because if the UU cookie is deleted, then so is your login status.
Also if you close the browser, and then 10 mins later open it again, most of the time your login status will be reset because your previous browser 'session' has in fact expired when you closed the browser.