Problem with AC Mitsubishi setting

Hello all,
I can’t set some parameters of my AC connected to the MELCloud integration. While all the others I can set them correctly, only fan_mode: and vane_horizontal: don’t work. This is my scene to set them up

name: TEST
  entities:
    climate.myAC:
      temperature: 25
      fan_mode: '4'
      swing_mode: '5_down'
      vane_horizontal: '5_right'
      vane_vertical: '5_down'
      state: off

and these are the possible settings for the two that are not working:

fan_modes:
  - auto
  - '1'
  - '2'
  - '3'
  - '4'
  - '5'
vane_horizontal_positions:
  - auto
  - 1_left
  - '2'
  - '3'
  - '4'
  - 5_right
  - split
  - swing

Everyone sets the right parameter except fan_mode: and vane_horizontal: which do nothing.
Do you have any idea where the problem might be? Thanks.