I own a Lexus LS600hL & a LS430. I bought VXDIAG VCX NANO for Toyota as a WiFi & USB version two years ago and since then I am very satisfied, costs a little more than usual mini vci but can do a lot more,
I never tested wifi connection. I prefer the USB connection from the car with the laptop without losing connection.
So far I have only read IDs and replaced the sensor with a weak battery with a new cloned one with the same ID, for the LS430 I programmed a key without any problems.
So the problem has probably been solved with IDs of the sensors, because that was not possible with the clone mini vci.