Color control issue with Yeelight Smart Bulb W4 when using SmartThings

Hello,

I’m having a problem with my Yeelight Smart Bulb W4.
I’ve set it up and connected it successfully using both the Xiaomi Home app and the Yeelight app. Everything works fine there.

However, when I connect the bulb to SmartThings, everything works except for the color selection:
Whenever I try to change the color, the bulb instantly switches back to what I would call its “default color” — a weak bluish white.

This happens every time I select a color in SmartThings, and it makes the color feature unusable.

Could you please look into this issue or forward it to the responsible team?
In case it matters: I’m located in Germany.

Thanks in advance!