Static When Grouping Node 2i with NAD CI580

I have multiple BluOS devices in my house: A Node 2i, a Pulse Flex 2i, and 4 zones running off a NAD CI580. When I group multiple zones on the CI580, everything works fine. When I group the Node and/or Pulse Flex with the CI580, they will get out of sync after a few songs and eventually, the CI580 will output a loud static/white noise sound.

All devices except for the Pulse Flex are hard-wired with ethernet, and I have a strong mesh WiFi system, so I don't believe weak signal is the issue. I regularly update all units with the updates that are pushed through the BluOS app, and still have this issue.

How can I get the CI580 to "play nice" with the other units?