Pyst2 - How to reconnect Asterisk manager?

Question

I'm using pyst2 to connect to the AMI (Asterisk manager interface). I have a event for shutdown, so it can close it and try to reconnect every minute.

My shutdown event:

def handle_shutdown(event, manager, hass, entry):
    _LOGGER.error("Asterisk shutting down.")

    manager.close()

    host = entry.data[CONF_HOST]
    port = entry.data[CONF_PORT]
    username = entry.data[CONF_USERNAME]
    password = entry.data[CONF_PASSWORD]

    while True:
        sleep(30)
        try:
            manager.connect(host, port)
            manager.login(username, password)
            _LOGGER.info("Succesfully reconnected.")
            break
        except asterisk.manager.ManagerException as exception:
            _LOGGER.error("Error reconnecting to Asterisk: %s", exception.args[1])

It works fine, until Asterisk started up again and it can connect. Instead of connecting I get this error: RuntimeError: threads can only be started once.

Does anybody knows how to do this correctly?

Here is my entire code.

Thanks!