On some system logging out redirects to an SSO logout. However if you redirect the browser too quickly, the session storage persists and the user remains logged into the angularjs app.

Tracked down this issue to here:

gsklee/ngStorage#39

The workaround (as suggested in ngStorage issue) is to wait for >100ms for session storage to flush, see here:

        $timeout(function () {
            $window.location = "http://localhost:9070/authserver/logout?redirect_uri=" + window.encodeURIComponent($location.absUrl());
        }, 110);