DellOS6 module hangs when exec playbook

Hi, all

A question confused me a long time. Ansible hangs when I was using networking dellos6 module.

I create a yaml file like this:

---
- hosts: dell
  connection: ssh
  gather_facts: no

  vars:
    cli:
      username: admin
      password: admin123
      transport: cli
      authorize: yes
      timeout: 3

  tasks:
  - name: "Get Dell EMC OS6 Show version"
    dellos6_command:
      commands: ['show version']
      provider: "{{ cli }}"
    register: show_ver

  - debug: var=show_ver