Can anyone tell me why does this old key work for me with the apt-key module of the ansible-playbook and this new key doesn't (404)?

The initial key worked for a short while (when I was developing these scripts) but when it expired (2019-12-06), apt's update_cache (correctly) started failing and it was advised to switch to the new key, which I cannot get to work with the apt-key module. It works well without ansible-playbook:

$ wget -O- https://build.opensuse.org/projects/home:jgeboski/public_key | sudo apt-key add -.

Both addresses seem to behave more or less the same when looking at them in the browser. Headers are a bit different though. As are file extensions.

Details:

This is relevant part of my script. Some other apt-key and apt-repository and apt uses are working fine.

- name: "Install purple-facebook: key"
  become: yes
  apt_key:
#    url: https://build.opensuse.org/projects/home:jgeboski/public_key
    url: https://download.opensuse.org/repositories/home:jgeboski/xUbuntu_18.04/Release.key

- name: "Install purple-facebook: repo"
  become: yes
  apt_repository:
    repo: "deb https://download.opensuse.org/repositories/home:/jgeboski/xUbuntu_18.04/ /"

- name: "Install purple-facebook: package"
  apt:
    pkg: purple-facebook

If I use the new key, it will 404. All output from running is with the -vvvv flag.

fatal: [localhost]: FAILED! => {
    "changed": false, 
    "invocation": {
        "module_args": {
            "data": null, 
            "file": null, 
            "id": null, 
            "key": null, 
            "keyring": null, 
            "keyserver": null, 
            "state": "present", 
            "url": "https://build.opensuse.org/projects/home:jgeboski/public_key", 
            "validate_certs": true
        }
    }, 
    "msg": "Failed to download key at https://build.opensuse.org/projects/home:jgeboski/public_key: HTTP Error 404: Not Found"
}

If I use the old key, it will fail at first update_cache: yes (which is the default for apt-repository).

The full traceback is:
WARNING: The below traceback may *not* be related to the actual failure.
  File "/tmp/ansible_apt_repository_payload_drREvW/ansible_apt_repository_payload.zip/ansible/modules/packaging/os/apt_repository.py", line 548, in main
  File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 559, in update
    raise FetchFailedException(e)

fatal: [localhost]: FAILED! => {
    "changed": false,
    "invocation": {
        "module_args": {
            "codename": null,
            "filename": null,
            "install_python_apt": true,
            "mode": null,
            "repo": "deb http://download.opensuse.org/repositories/home:/jgeboski/xUbuntu_18.04/ /",
            "state": "present",
            "update_cache": true,
            "validate_certs": true
        }
    },
    "msg": "apt cache update failed"
}

Background:

I am automating personal PC setups for practical reasons as well as to learn more about Ansible and Ansible-playbooks.

Thanks!