Service Template not supported in button actions?

[mplogas]

The problem

Based on your lock example, I wanted to incorporate the lock.open for tedee locks:

Here's what I have tried, in-line with the official documentation . I also tried various permutations and service_template, with no luck,

hold_action:
  action: call-service
  service: >-                                                   
    {% if is_state('lock.haustuer', 'locked') %}
      lock.unlock
    {% else %}
      lock.open
    {% endif %}
  entity_id: lock.haustuer

This raises an error that the <entire template string> is not a supported service. When using service_template instead, I don't get an error message at all. but it'S not working either.

  hold_action:
    action:
      - service_template: >
          {% if is_state('lock.haustuer', 'locked') %}
            lock.unlock
          {% else %}
            lock.open
          {% endif %}
        entity_id:  lock.haustuer

Is templating the service call supported?

What version of Paper Buttons Row has the issue?

2.13

What version of Home Assistant are you running?

2023.5.2

What version of the Frontend are you running?

20230503.3

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response