HomeAssistant Blueprint - Mute media player when phone rings or is calling. Only when person is home and the mediaplayer is playing.

mute_media_player_on_call.yaml

blueprint:
  name: Mute mediaplayer when calling.
  description: >
    Mute a mediaplayer when phone rings or is calling.
    Only when person is home and the mediaplayer is playing.
  domain: automation
  input:
    phone_state:
      name: Phone State sensor
      description: All sensors form the mobile app. Select the phone state sensor here.
      selector:
        entity:
          integration: mobile_app
          domain: sensor
    person:
      name: Person
      description: Select the person that needs to be at the zone selected.
      selector:
        entity:
          domain: person
    zone:
      name: Zone
      description: Select the Zone the person needs to be in.
      default: zone.home
      selector:
          entity:
            domain: zone
    media_player: 
      name: Media Player
      description: Select the media player that needs to be muted.
      selector:
        entity:
          domain: media_player

trigger:
  - platform: state
    entity_id: !input phone_state
    to: "ringing"
  - platform: state
    entity_id: !input phone_state
    to: "offhook"
variables: 
  zone: !input zone
  zone_name: "{{ zone[5:] }}"
  entity: !input person
condition:
  - "{{is_state(entity, zone_name)}}"
  - condition: state
    entity_id: !input media_player
    state: playing
action:
  - service: media_player.volume_mute
    entity_id: !input media_player
    data:
      is_volume_muted: true
  - wait_for_trigger:
    - platform: state 
      entity_id: !input phone_state
      to: "idle" 
    timeout:
      seconds: 300
  - service: media_player.volume_mute
    entity_id: !input media_player
    data:
      is_volume_muted: false

Calling the media_player.volume_mute service twice will cause a warning in the log that the service is already running.
It can be removed somehow. I can't figure it out.