But this morning, following the reboot of the Roon Core, I have the Chromecast Group Endpoint duplicated.
Both have the Chromecast Group ‘anchored’ on the same Chromecast Audio’s IP Address.
All that has happened since, is the scheduled daily reboot of the WAP.
I implemented this to prevent the Chromecast devices from disappearing from Roon, as reported in an earlier ticket here Roon 1.8 B898 loses all WiFi based Roon audio endpoints after 48 hrs
Perhaps the duplication is linked to this issue, which also relates to Discovery via mDNS. In this case a lack of discovery after a period of time, then with a reset of the WIFI network, the discovery duplicates the Chromecast Group related Endpoint.