Google home only controls on/off

Unable to adjust brightness within the app or via Assistent. Mine is the mi desk lamp pro, having latest2.0.6.0041 firmware.
I’ve seen the same issue on some older bulbs on the forum, it might be the same firmware issue.
Btw I have the mi desk lamp 1 working at all same setting, working flawlessly with all possible controls via Google home.

The funny part is, when I crazily tap the brightness control in home app, it would work, but if I clean the background process and start the home app again, it wouldn’t work.
With my old lamp, i can always control the brightness of it even without opening the background process.