Flux integration is not working properly anymore

Hi guys, my Flux platform broke few updates earlier and I have not found a way to fix it. The problem is that it does not change the color temp in steps but instantly from 4000 to 1900 (TRADFRIbulbE27WSglobeopal1055lm). I have been using this config for a loong time without a problem, but now it just doesn’t work as before. I am unsure if my lights used to have this range of color_temp but now it is 250-454. If this range is used in the config an error occurs in the log, that this range is not supported. Could anyone help me with this, please?

- platform: flux
    name: Pokojicek Flux
    lights:
      - light.0x0c4314fffe1b054f
      - light.0x2c1165fffec2493d
      - light.0x50325ffffefea6f3
      - light.0x50325ffffefea7ec
      - light.0x2c1165fffebbbdfc
      - light.0x2c1165fffe678455
      - light.0x2c1165fffebdb24b
      - light.0x2c1165fffebbbf1a
      - light.0x187a3efffe2c9c3e #dole
      - light.0xf4b3b1fffec40b63 #dole
      - light.0x84ba20fffead8c1f #dole
    start_time: "07:00"
    stop_time: "20:00"
    start_colortemp: 4000
    sunset_colortemp: 3000
    stop_colortemp: 1900
    mode: mired 
    disable_brightness_adjust: true
    transition: 1
    interval: 60