Hello,
Maybe you can have access at the session directly on the server.
You can use some config for LimeSurvey, but sometimes it's don't work because of the server configuration.
See
docs.limesurvey.org/Global+settings#General for LimeSurvey
36 000 seconds is one hour , the interviewer use one hour or more bettween each page ????
I think you have a session problem on your server.
Maybe have a look to your php.ini configuration
www.php.net/manual/en/session.configuration.php
And in some server, session files are removed by a script all X minutes