When creating a new Indigo Hubitat device, In the available HE device list, I see a few HE devices that no longer exist. That is, they did exist in HE at some point, but were removed. These devices do not appear in the HE device list and are not published from the HE MQTT app. I have rebooted both devices several times. Obviously, something, somewhere, is caching the information.
This is certainly not a big problem. But, it seemed worth reporting.