If logging out at the end of the session doesnt work then, me personally, i would say thats a bug in your application and should be something you relay back to dev. If your logging out then the session token should expire, regardless of how long that token is expected to last.
This is something dev will have to add in the actual application.
Now to do this go to -
Project settings > Desired capabilites > Web Ui > Chrome
Follow this, number 3 shows how to do for incognito
https://docs.katalon.com/katalon-studio/docs/desired-capabilities-for-chromechrome-headless.html