How to get remote server IP address in bigip_pool_member module using Ansible Playbook

I am looking for to get Ansible inventory IP address while using bigip_pool_member Module. I did loop over inventory group and able to get hostname but unable to fing IP address.

- name: Add pool member
      bigip_pool_member:
        state: "present"
        pool: "pool name"
        partition: "Common"
        name: "{{ item }}"
        host: hostvars[item]['ansible_default_ipv4']['address'] # This one is not working
        port: 80
        provider: "{{ provider }}"
      loop: "{{ groups['test'] }}"
      delegate_to: localhost

Note:- I have windows inventory and gather_facts is trues.

I am getting following erroe,

1. Sometime it is working and adding extra ephemeral node in pool.
2. Sotime throwing hostvars[item]['ansible_default_ipv4']['address'] is not a valid address

Issue resolved, Updaed dynamic inventory creation command with echo ${SERVERS} | tr ', ' '\n' >> ${BUILD_ID}; now able to gfet host IPs – user3305131 55 secs ago