This problem is easily reproducible.

Context:
Eclipse GlassFish 7.0.14
JDK versions 11.0.22
JDK version 17.0.8
JDK version 21.0.2
Windows 11 Pro
Derby 10.15.2.0

Reproduce by doing the following:

1. In Glassfish Admin Console go to Domain -> Applications Configuration -> Admin Session Timeout.
2. Change Admin Session Timeout to 0, which should mean that the Admin Console never times out.
3. Wait for 30 minutes.
4. Click on any Admin Console link. Expected behavior: the Admin Console will remain logged in as user admin, it will not require another login.
5. Result: You will be directed to the login page.