Hey there @shipping,
Thank you for posting in the community! Without accessing your computer to find out directly, my first instinct would be to check how quickly the computer goes into a "sleep" or "power saver" type mode. I would also maybe double check the browser that is being used has had it's cache/cookies cleared recently. I'm not positive that is the issue, but it could be a good place to start! 🙂
Additionally, are you seeing it log out after specific actions are taken? Any additional details of that variety may help myself or another community member attempting to assist.
I hope this helps!
I would still recommend clearing cache and cookies, as I know that has solved several different issues i've had in the past.
With that in mind, I would also recommend to document the full details of these instances and reach out to our Support department either in app or via Support@Shipstation.com for additional support.