Ikea RGBW bulb random color

Just bought a IKEA Trådfri RGBW bulb and want to use the random color function, but the color won’t change.
What am I doing wrong?

I have the same problem at the moment, it look slike there is a bug that if the current color is a white range color it keeps randomizing to a white range color.
After manualy setting it to a color like red or blue or something not white it wil cycle trough other colors.

Did you already solve this?