Yeelight led light flicker and rests to 20% brightness mode

Hi, I recently received yeelight led ceiling light and it is not working as it should. When I power-on the light from an electrical wall switch, it gets on with 100% bright light but within a fraction of a second it starts to flicker and come down to 20% brightness at 2700K color temperature (In app “Moonlight” mode has this brightness and color temperature setting). So basically it resets to Moonlight mode everytime I try to change brightness or color temperature in the app or from the remote control.

Firmware is upgraded to the latest version 1.5.9_0022 as per the app and also tried resetting the light but no resolution so far.

Anyone else seen this problem or think this is the faulty light I received?