Color temperature not displayed correctly

Hi All,
As a newbie to the Home Assistant community/forum I hope I dropped this question/issue in the right topic. If not, please let me know how to do it right.

The context:

  1. Running Hass.io 104.3 with an up to date Conbee II stick (v5.0 and now v5.1)
  2. Connected IKEA bulps that support 2200-4000kelvin colors
  3. The same issue was there while the bulps where connected via the IKEA hub and the bulp firmware is up-to-date as did running previous versions of Conbee II while connected through the IKEA hub.
  4. In my automations I use ‘kelvin’ to define the color.

The thing I am experiencing is that the slider does dot represent the color of the light.
I believe the adjustments done by my automations do work, but the slider always show 4000k. When sliding, the color of the light changes. Comming back to the view, the slider is back on 4000k.

The brightness is correct by the way.

Looking into the ‘Entity state attributes’ under ‘Developer tools’, I see that there is no attribute that indicates the color temperature, where it does show Brightness. So, I assume that’s the reason things don’t update.

Perhaps it is something for future development or it is broken. I think it has worked in the passed, but am not sure since I did not pay much attention to it back then.