Yeelight 650 no more ambient colour


I have 2 yeelight 650 since 1 year. Latest firmware on both. It’s worked perfectly until one Day when i tried to open the ambient colour on one of the lamm nothing happened. The moonlight worked perfectly but no colour.
Did you have anything to solved it?

I share a picture also.

Happened to me. Try to disable and enable Lan control in app.