problem about include statement and host queue

[stillfox.lee]

I use include in my playbook, but it influenced host queue.Here is the problem:

I got a playbook like this:
`

• name: Init base system env
  hosts: all
  gather_facts: yes
  sudo: yes
  vars_files:
• secrets.yml
  roles:
• system_env
• set_timezone
  `

in roles/system_env/tasks/main.yml :
`