A strange thing that caught my eye was the beginning of the cookies value: '$cookies = '__Secure-3PSID=zg...'
I have never before seen it beginning with "___Secure"

Again, updating my NEST with a new temperature works! So I would think that authentication should work fine, but the above info ...

I had the exact same problem, but with the Ikea plug instead of the lights. To fix mine I did the following:

- Updated the zigbee2mqtt plugin since I apparantly had an older version
- Restarted the Domoticz system
- Removed the device from Zigbee2MQTT through Node-Red. To do this you have to push ...