Mijia Bedside Lamp 2 not showing red colour

I have news.

As I said the other day when I turn on the lamp, for a second it´s pure red like my old bedside lamp gen 1:

After that second the lamp turns white-orange red and the red dissapears. Also I can hear a buzz sound coming from the lamp when it changes to this new colour.

And sometimes when I turn on the lamp it keeps red as the first photo. Please can you tell me if my lamp is faulty?

Brightness is at 1% in this photos. Captured with the slow motion camera of my xiaomi A1.