yeelight 650 ambient light issues

i have a problem with a color of 650 ceiling light.
Half of the light has one color and second half another .
For example one side blue and another is purple.
When in white mode the blue side becomes light blue and the purple side is white.
China server .Firmware

If its a hardware problem please explain how to fix. (Can not send back to seller because of very expensive shipment ant taxes issues)