Yesterday I upgraded my Bulb to version 2.0.4._0039. After upgrade Bulb worked fine.
Unfortunately after 5-10 minutes Bulb stopped responding.
I could not turn it on from the Yeelight app or from the Hassio. I made a reset to the factory settings, but no effect. Bulb hangs afre few minutes.
I have the same problem with Lightstrip Plus 2.0.4._0051
Other Yeelight devices are working fine (Bedside Lamps, Mono bulbs).