Remaining sessions upon signout in BBB-GreenLight integrated with KeyCloak

[tzengshinfu]

Hello, Folks:

I'm a newbie to BigBlueButton,
following the installation guide (https://github.com/bigbluebutton/bbb-install/blob/v2.7.x-release/README.md) using bbb-install.sh to install, simultaneously setting up GreenLight and KeyCloak.
I referenced the GreenLight integration with KeyCloak guide (https://docs.bigbluebutton.org/greenlight/v3/external-authentication) and completed the setup (the difference being I used `User federation` to integrate with MS ActiveDirectory).

Currently, when logging into BBB, it redirects to the KeyCloak login screen, and I can successfully log in. KeyCloak also confirms the user's logged-in session.
However, after clicking the `Sign Out` button in BigBlueButton, I notice that the KeyCloak session remains.
Consequently, when attempting to log in with another account, it skips the Username/Password screen and directly enters the homepage of the previously logged-in account.

Could you advise on what I might be missing? Are there additional settings I need to configure? Any suggestions would be greatly appreciated.

Component Versions:
OS: Ubuntu focal
BigBlueButton: 2.7
Greenlight: 3
Keycloak: 20


/* GET BETTER EVERY DAY */

[tzengshinfu]

PS: I've found others experiencing the same issue

(https://github.com/bigbluebutton/greenlight/issues/5211)