Temperature and Humidity Sensor

Yes I have the tuya version got it cheap on ebay but I have exactly the same issues as yours and I’ve also read in the hubitat forum people having the same issues, maybe it needs a custom device handler to stay connected.

Is it the same situation with the BW-IS5 water leak sensor? Does it work normally, or disconnects from time to time?

Kind of… it doesn’t always report, likely to save on battery.