I have the same problem like in YLXD50YL (2.0.6_0025) Home Assistant Unavaliability but with another model. After update to 2.0.6_0003
After the lamp is physically turned off and turned on, they are available in the Home Assistant for a while times. It may be half day or five minutes.
ERROR (SyncWorker_32) [homeassistant.components.yeelight] Unable to update device 192.168.XX.XX, [name]: Bulb closed the connection…
In Yeelight app its avalible all time.
Mi id: 4188261261 CN