Guest user ticket access token links work sometimes but other times redirect to the login page where the user cannot log in. Clearing cookies fixes it.

This is the Guest User session bug in v1.18.2. Revert the session patch from: https://github.com/osTicket/osTicket/pull/6766/commits/416b548bd812188fec62c89fe8bfb0a3128731a1 (remove the green lines, restore the red lines in class.ostsession.php). After reverting: restart the webserver and PHP-FPM, TRUNCATE the ost_session table, and have all users clear their browser cookies/cache. Using class.ostsession.php from v1.18.1 in a v1.18.2 installation is a known working workaround until v1.18.3.