@Riley_S Yes, this is a three-way installation, with the travellers between the two switches at most 15 metres. I've tried the travellers both ways. The problem, however, appears to be more severe...

I just installed a KS230 Kit v1.8. I think I have all the wiring correctly connected. But the main switch is not initializing correctly and is not producing power on either of the traveller lines....

@Riley_S OK. I'll reset the device. It still would be nice to document this behaviour.

@Riley_S Yes, the light behaves correctly if I unblock it. Also, I did set it up in the app. How can I disconnect the device from the app?

The LED on my KS225 is stuck on red, even though the switch is connected to WiFi and I can control it both from the KASA app and a Matter controller. I do have the switch blocked from the internet....

That is the question. There is nothing in the documentation sent with the switch so I'm worried about burning out my fan motor if I use a KS220 for it.