650 Yeelight always goes offline

Hi recently I bought a Yeelight ceiling light 650.

Sometimes it was successful connected. however it it goes offline again very often.
I’ve reset many time already but has the same problem. Please advice me how to do

My Mi ID: 227467693

If anyone could help me through wechat: justinchinglee I speak both English and Chinese

Tengo el mismo problema con la lámpara de techo guangcam 50w, he probado muchos routers y sigue el problema, lámpara desconectada. Solución o devuelvo la lámpara ayuda!