Using color_temp on Hue color bulb 'erases' color values?

Hi,

On a Hue color bulb, regular turn_on shows like this in more_info, showing brightness, color_temp and color wheel:

I can touch the wheel and brightness and all attributes stay. However, changing the color_temp results in the color_values disappear:

turning off the light, and back on, makes these re-appear (btw, note the color_temp is no longer available though the slider is:

this is reflected in the developer-tools/state also, so not only a frontend issue, but a core.
do we have a bug?
files an issue to be sure: https://github.com/home-assistant/core/issues/36871