I think some Yeelight product has internal WiFi issue.
1) I have 3 Bulb + 1 stripe led in the same room
2) Bulb are 2meters more away to the WiFi then the Stripe Led (that is 1meter away from a Mi WiFi Repetear)
While ping the Stripe, i received a lot of packet loss / timeout or in the best scenario the ping is around 500ms. The Buld Light ping is always good, no packet loss, average ping 10ms.
Configuring a Static DHCP (suggested from one user in the forum) has help a bit.
Anyway there are product with poor WiFi reachability i think.
Now i moved 50cm on the right side the Stripe Led, the ping is better (over 50 ping I'm able to lost only 4-5 packet).
My suggestion is to notify the User with an Alert in that cases "Hey, the WiFi is poor".
In my case i cannot improve more the WiFi, but with this type of message i can understand that the Stripe LED has a problem and maybe consider to return back the stripe (I have 4 stripe, only this one is making me crazy!).