Alexa Media Player from HA - 1 echo works, but not the rest

Configuration
1

Hello,
I have an issue with 3 out of my 4 echos.
I made a simple lovelace card like the one below.
Works perfectly on one of my echo’s … but when I try the same on the other 3, Alexa is saying that she “does not know how to to that”.
If I just say “Alexa, Plax XXX FM”, she is launching the radio from TuneIn like a charm.
Is there any setup I am missing on my other 3 echo’s ?

type: entities
entities:
  - input_select.media_source
  - entity: media_player.master_echo
    tap_action:
      action: call-service
      service: media_player.play_media
      service_data:
        media_content_id: |
          {% if is_state("input_select.media_source", "XXX FM") %}
              Play XXX FM
        media_content_type: custom
        entity_id: media_player.master_echo