Minimal playbook to demonstrate bug in "ufw" module (see Ansible #65443)

ufw.yml

# ufw.yml

---

- name: ufw.yml
  hosts: debian-stable-amd64
  become: true

  tasks:

    - name: Get "before" value of DEFAULT_INPUT_POLICY
      command: "grep ^DEFAULT_INPUT_POLICY= /etc/default/ufw"
      register: before
      changed_when: false
      args:
        warn: false

    - name: Display "before" value of DEFAULT_INPUT_POLICY
      debug:
        var: before.stdout

    - name: Change default input policy from "drop" to "reject"
      ufw:
        direction: incoming
        default: reject

    - name: Get "after" value of DEFAULT_INPUT_POLICY
      command: "grep ^DEFAULT_INPUT_POLICY= /etc/default/ufw"
      register: after
      changed_when: false
      args:
        warn: false

    - name: Display "after" value of DEFAULT_INPUT_POLICY
      debug:
        var: after.stdout

Example playbook to demonstrate the issue experienced in Ansible #65443