Session is never expired in JSF Websocket

I'm using Omnifaces websocket. Session is never timeout. I tried with jsf websocket. There's the same result. When I go to another page that doesn't use websocket and stays at that page, session will expire normally. Here are example of my codes xhtml with javascript:

 <o:socket channel="message"   onmessage="onMessage" /> 

and function onMessage as

 function onMessage(message, channel, event) {
            var newBcMsgs = document.getElementById("topF\:newMsgs");
            if (!isEmpty(newBcMsgs)) {
                addClass(newBcMsgs, "active");
                addClass(newBcMsgs, "text-warning");
                sessionStorage.setItem(document.getElementById('usernameTop').innerHTML, "news");
            }
        }

In managedbean with ApplicationScoped(import omnifaces.cdi.Push, PushContext) :

  @Inject
    @Push(channel = "message")
    private PushContext pushMessage;

    public void sendMessage(final String msgs) {
        logger.debug("send a msgs now: {}", () -> msgs);
        pushMessage.send(msgs);
    }

I'm using Omnifaces 3.6 with Payara 5.201 Jakartee 8. So, what should I do or correct for allowing session expried if there're long idle times?