BUMP!
I have the same problem with the Yeelight 1S bulb. I bought the first bulb at the end of last year (2020), I bought the second bulb quite recently - it was delivered to me last Friday. I bought both bulbs from the same seller on the AliExpress platform. For now, the problem is with one bulb. Both bulbs are updated with the latest firmware - i.e. 2.0.6_0034. Server: Europe and Africa (Frankfurt, Germany). I am very disappointed! Having spent so much money, I expected quality and support.