Zones out of sync, stopping playing, jumping ahead to next song

Roon Core Machine

Mac mini, Apple M1 chip, 8 GB memory, macOS Ventura version 13.4

Networking Gear & Setup Details

Spectrum modem, Netgear Prosafe 8 Port Gigabit Switch, model GS108, ethernet connections

Connected Audio Devices

NAD M33, NAD CI 580, NAD CI 16-60, connected via ethernet

Number of Tracks in Library

8700 tracks

Description of Issue

System has been fine for over a year. Now, when playing iTunes library through Roon, everything is normal when using the one zone powered by the M33. When I add other zones, all powered by the CI 580/CI 16-60 combo, music is out of sync with M33, and zones powered by CI combo are out of sync with each other. Also, songs get started then pause and jump to the next song and that repeats. If the system makes it to the end of the song, it often stops playing before the next song starts. Roon also losing control of device. Same problems if I run the CI combo independent of the M33. All zones powered by CI 580/CI 16-60 are unusable at this point. I don’t have these problems when using the Bluesound app to play radio.