Hey @David_Haslett1 — Thanks for sharing your observation with us. Your feedback is always appreciated!
May I ask that you please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Since updating to the latest version of Roon, have you tried power cycling your Core machine, networking hardware, and the Sony TV that has Chromecast built in?
Thanks,
Dylan