In order for Roon’s @support team to better assist you, please provide a brief description of your current setup and the nature of the issue using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so they have a clear understanding of how your devices are connected.
I fixed it. All I had to do was choose a different endpoint. I’ll diagnose the offending endpoint later, since Roon can’t state why it’s not playing reliably there, despite it never being a problem before today. Thanks.