Roon is not good for grouped Airplay Speakers

Audio Gear Talk Airplay
4

You are not alone. Your Roon installation probably updated to Roon 1407. There’s this:

Roon Build 1400+ : Issues with Airplay Connection to Certain Endpoints [Ticket In, Fix Forthcoming] - Support - Roon Labs Community

I’m astonished that Roon still offers no mechanism to fallback to a prior version when one of their updates borks user systems.