Good afternoon everyone.
Thank you all for the great research. I also have this issue and if possible I would also like to test the beta firmware. I also made a thread about this today before I saw this post. ( connection issues Home Assistant after update 2.0.6_0030 - 未分类 - Yeelight Forum)
My MI ID: 6317188532
Yeelight 1S
My bulb model is. Yeelink.light.color4