I have just become aware of the zigbee and zwave graphs which were included in the last release. Holy cow, that's cool! Mad props to the user who created it, and props to the hubitat team for including it in core!
Now, I remember reading some posts on how to deal with an "unknown" zigbee device, but I can't seem to find the post again. I have an "unknown" device in my zigbee graph. When I scroll through my devices, I don't see anything suggesting an unknown device.
What is the best method to troubleshoot this, and remove the unknown device?
I just did this.
I did a Zigbee Rebuild Network.
I had removed a device, and it stuck around.
Probably only noticed because I was looking, but rebuild got rid of it.