Seems especially problematic with CBS Radio stations. They all play fine through the radio.com app, but the Sonos is not reliable. I was able to get WCCO AM and KCBS AM to work today. But when I switched away from them to try and get WBBM AM out of Chicago or WCBS AM out of NYCit failed and then I could not get any of them to work.
Best answer by Airgetlam
Have you contacted Radio.com? As far as I am aware, all Sonos does is point your speakers to the server specified to the by Radio.com.