remote_user does not appear to be working correctly

I have a playbook that executes ‘emissary_deploy.yml’ as an include:

- name: Delete/link properties
  hosts: emissary
  remote_user: remoteUser
   tasks:
    - name: Link all properties files
...
The task executes as user 'ec2-user' when I'm expecting it to be
'remoteUser':
...
*01:11:53* <172.17.70.215> ESTABLISH SSH CONNECTION FOR USER: *ec2-user*

Variables will override playbook keywords. See "Precedence categories"
https://docs.ansible.com/ansible/latest/reference_appendices/general_precedence.html#precedence-categories

There must be a variable *ansible_user* or *ansible_ssh_user* or
environment *ANSIBLE_REMOTE_USER* with the value *ec2-user*

See "ssh connection plugin"
https://docs.ansible.com/ansible/latest/collections/ansible/builtin/ssh_connection.html#ansible-builtin-ssh-connect-via-ssh-client-binary

For example, the playbook below

  > cat pb.yml
  - hosts: test_01
    remote_user: remoteUser
    tasks:
      - debug:
          var: ansible_user

gives (abridged)

  > ANSIBLE_REMOTE_USER=admin ansible-playbook pb.yml
  
  ok: [test_01] =>
    ansible_user: admin

That was it. Thank you very much.