NotFoundPlugin not working

Hi,

My app is based on INVO Security and NotFound plugins. I managed to get the ACL in Security to work, but not the NotFound.

Whenever i type https://localhost/somerubbishtext, the NotFound Plugin Exception is not triggered. Instead, the page got redirected to /login/index

Services.php

/**
 * The Events Manager
 */
$di->set('dispatcher', function() use ($di) {

$eventsManager = new EventsManager;

/**
 * Handle access control list using SecurityPlugin
*/
$eventsManager->attach('dispatch:beforeDispatch', new Security);   

/**
 * Handle exceptions and not-found exceptions using NotFoundPlugin
 */
$eventsManager->attach('dispatch:beforeException', new NotFound);

$dispatcher = new Dispatcher;
$dispatcher->setEventsManager($eventsManager);

return $dispatcher;
});

NotFound.php

public function beforeException(Event $event, MvcDispatcher $dispatcher, Exception $exception)
{
    if ($exception instanceof DispatcherException) {
        switch ($exception->getCode()) {
            case Dispatcher::EXCEPTION_HANDLER_NOT_FOUND:
            case Dispatcher::EXCEPTION_ACTION_NOT_FOUND:

                $dispatcher->forward(array(
                    'controller' => 'errors',
                    'action' => 'index'
                ));

                return false;
        }
    }

    $dispatcher->forward(array(
        'controller' => 'errors',
        'action'     => 'index'
    ));

    return false;
}

Security.php

public function beforeDispatch(Event $event, Dispatcher $dispatcher)
{
    $auth = $this->session->get('auth');

    if (!$auth){
        $role = 'Guests';
    } else {
        $role = 'Users';
    }

    $controller = $dispatcher->getControllerName();
    $action = $dispatcher->getActionName();

    $acl = $this->getAcl();
    $allowed = $acl->isAllowed($role, $controller, $action);

    //var_dump($acl);
    //die;

    if ($allowed != Acl::ALLOW) {

        $dispatcher->forward(array(
            'controller' => 'login',
            'action'     => 'index'
        ));
        return false;
    }

}

Expert Advice appreciated!