Mushroom template card cannot set mode programatically

Configuration Frontend
1

Hello,
I am struggling with a template card where I would like to set the mode programmatically.

type: custom:mushroom-template-card
primary: |-
  {% if is_state_attr('light.livingroom_main_light', 'night_light', true) %}
    normal
  {% else %}
    moonlight
  {% endif %}
icon: mdi:home
icon_color: yellow
layout: vertical
tap_action:
  action: call-service
  service: yeelight.set_mode
  service_data:
    entity_id: light.livingroom_main_light
    mode: |-
      {% if is_state_attr('light.livingroom_main_light', 'night_light', true) %}
        normal
      {% else %}
        moonlight
      {% endif %}
entity: light.livingroom_main_light_ambilight

The code above is not working correctly. Upon button click, I get an error that the mode must be of a value normal or moonlight.

The following code works correctly

type: custom:mushroom-template-card
primary: |-
  {% if is_state_attr('light.livingroom_main_light', 'night_light', true) %}
    normal
  {% else %}
    moonlight
  {% endif %}
icon: mdi:home
icon_color: yellow
layout: vertical
tap_action:
  action: call-service
  service: yeelight.set_mode
  service_data:
    entity_id: light.livingroom_main_light
    mode: |-
      normal
entity: light.livingroom_main_light_ambilight

Do you have any idea, what could be wrong? I really do not understand this. I am pretty sure that the following code should work because when I use it for setting the name, the name is set correctly.

{% if is_state_attr('light.livingroom_main_light', 'night_light', true) %}
        normal
      {% else %}
        moonlight
      {% endif %}

Thanks for help.

2

You can’t template service calls in Mushroom cards.