Lose connection after first publish about mqtt HOT 1 CLOSED

Hi,
I use cloudmqtt and Photon/MQTT, but don't have any problem. like this. try on new Photon firmware?

    if (client.isConnected()) {
        client.publish("/outTopic","hello world");
        client.loop();
    } else {
        // publish/subscribe
        client.connect("mqttclient", "user_id", "password");
        if (client.isConnected()) {
            client.publish("/outTopic","hello world");
            client.subscribe("/inTopic");
            RGB.color(0, 0, 0);
        }
    }
    delay(1000);

from mqtt.