Notify groups error?

I have the following code, which works for the two primary notify groups, but not for the one which combines both of them together.

notify:
  - name: jamesgroup
    platform: group
    services:
      - service: mobile_app_james_phone

  - name: katygroup                                                                                                                                       
    platform: group
    services:
      - service: mobile_app_katy_iphone12

  - name: bothgroup
    platform: group
    services:
      - service: mobile_app_katy_iphone12
      - service: mobile_app_james_phone

For some reason the bothgroup simply does not set up? Any clues? :slight_smile: