[keycloak-user] Session already invalidated

Hello, I read this thread: http://lists.jboss.org/pipermail/keycloak-user/2017-February/009550.html I am hitting the same issue and I can use the same workaround. But I would really like to know why Keycloak calls session.invalidate when processing the logout. 'logout' and 'invalidate' are 2 different operations and in theory you may want to logout while still keeping the session alive. Thank you.