Since the update to 1.17 (we've had 1.17, 1.17.1 and 1.17.2 in the last couple of weeks, so can't be sure whether this was an issue with all versions or just 1.17.2) logged in users can view their ticket list (/tickets.php) and view tickets (eg /tickets.php?id=1234567 ) but sometimes when clicking the tickets link in the top right of the page it takes them back to the login page, not the list of tickets. Clicking refresh on the login page without typing in credentials has always loaded the tickets list page again but its confusing and annoying users that don't realise this and go through the login process again. I've tested in Chrome and Firefox but it normally only happens once in any given period then won't happen again, maybe for a couple of days. I've seen it demonstrated on a screen share and on my own PC logged in as a user account.
Any ideas what could be causing this and how we might stop it happening?