I'll pm you my Mi ID number.
I just checked my Apple Airport, and I can't see the bulbs x2, strip x1 and lamp x1 that's offline. I had another bulb offline, and I rebooted, and it's fine. All these are in bedroom, rest in my living and other bathroom are fine. I think they have been offline for few days. In last few days, I had reboot my homebridge thats only running yeelight official plugin almost on daily basis. I don't know if these 2 issues are related but haven't had an issue until last few days ago.
fyi, I'm using mac address authentication to restrict devices to my network.