Emulated Hue does not expose groups anymore?

Configuration
1

Before the new configuration format I managed to expose a group that contained all lights. Afer the updated configuration it does not expose the group anymore. Anything wrong with my code?

From configuration.yaml

emulated_hue:
  expose_by_default: false
  entities:
    group.lighting:
      name: "Everything"
      hidden: false
    switch.sofia_bedroom_lava_light_switch:
      name: "Sofia Lava"
      hidden: false
    switch.sofia_bedroom_bedside_switch:
      name: "Sofia Bedside"
      hidden: false
    switch.paul_bedroom_bedside_switch:
      name: "Paul Bedside"
      hidden: false
    cover.paul_bedroom_blind_level:
      name: "Paul Blind"
      hidden: false
    cover.sofia_bedroom_blind_level:
      name: "Sofia Blind"
      hidden: false
    scene.sofia_bedroom_by_night:
      name: "Sofia Night Mode"
      hidden: false
    scene.sofia_bedroom_by_day:
      name: "Sofia Day Mode"
      hidden: false

From auto-generated emulated_hue_ids.json:

{
    "1": "scene.sofia_bedroom_by_night",
    "2": "scene.sofia_bedroom_by_day",
    "3": "cover.sofia_bedroom_blind_level",
    "4": "switch.sofia_bedroom_lava_light_switch",
    "5": "cover.paul_bedroom_blind_level",
    "6": "switch.paul_bedroom_bedside_switch",
    "7": "switch.sofia_bedroom_bedside_switch"
}

As you can see the group is missing and of course Alexa can not find it either. What is wrong?