Tradfri Transition

Some of my tradfri bulbs have issue with not beeing able to use transitions and set wanted brightness, the way i made it work is to first send a “turn_on” to the problematic bulb first, and then the scene with the transition.
(scene includes that same problematic bulb)
It seem that some of the bulbs needs to be turned on before it can recive and understand the transition and brightness data.

Automation

    action:
      - service: light.turn_on
        entity_id: light.living_room_corner_hallway
      - service: scene.turn_on
        data:
          entity_id: scene.pre_watch_movie
          transition: 2.5

Scene

- id: c6298787-c935-497b-83b3-1fa5ccfc7b65
  name: Watch Movie
  entities:
    light.hallway_mirror:
      state: 'off'
    light.hallway_wardrobe:
      state: 'on'
    light.living_room_window:
      state: 'on'
      brightness: 29
    light.living_room_corner_hallway:
      state: 'on'
      brightness: 35