I'm having the below problem, see if anyone else is having the same:
When I add the Yeelights to my network using MiHome (Mijia) app, I have no problem with integrating with Alexa. However, I cannot create Yeelight group successfully. I have 3 lights in the dining room that I would like to control simultaneously. However, I can create the group in the Alexa Yeelight skills, but not in the MiHome app.
Now on the other hand, if I add my Yeelights to my network using the Yeelight app, I can create the group of 3 lights successfully. However, I cannot discover the devices on the Alexa Yeelight skills.
Any one else has tried this and found the same problem? In short:
1) MiHome app can integrate with Alexa but I cannot create the lights as a group
2) Yeelight app can create the group of lights, but cannot integrate with Alexa