ya, another topic guy also advise no need to switch off.
guess i will on 24/7 onward.

it's so funny that my son woke me up every night cause he saw the blue blinking outside the room.. haha

Sold off all my xiaomi automation devices and switch to sonoff now.

Just got mine xiaomi hub v3, only connected one wall switch as child devices so far for testing purpose, work as expected and no need reconnect the devices even power off and on back the hub.

wall switch is fine cause it is using power.
for those sensor, most of the time it can't auto detect.
just press on the button to reconnect it faster.

You mean those like window and motion sensors? Let me try later, will update again.

yes, those motion sensor and windows sensor which run on battery.

Regarding your question about the hub indication light, it's able to turn it off at setting through the app.

I have tried off wifi for few hours and on back, doesn't seems like need to reset any of the devices.

ya, off wifi won't affect the connection.

i mean that if i off my gateway, it takes time to reconnect all the child device. Especially those which run on battery, i found it hard to find it themselves. So i press the button on those device once (not long) just let the gateway detect it easily. you will hear the voice "normal connection" after this. it's not a reset.

Hmm I did try off the gateway for few mins and on back, still able to detect the sensor normally. Not sure if power off for long time but guess it should be always on once you start to use it unless there's blackout.