While I haven't tested it thoroughly enough, I think I found a possible fix. I have a Denon AVR-X4700, with routing provided by a TPLink XE75 Deco mesh, and my service is Starlink. I bypassed the Starlink router in order to use the faster TPLink. I also have several other Denons and Yamaha receivers, but the 4700 was consistently dropping connection where Pandora streaming would simply stop. After a ton of troubleshooting, I found that the DNS entries for the 4700 were set to 1.1.1.1 (Cloudfare). I decided to try 8.8.8.8 (Google's DNS services). After changing that, it played for about 3 hours without dropping connection. I'll try playing it for longer periods before I claim total victory, but give that a try to see if it works for your Marantz. And btw, Pandora was exhibiting the same behavior on my ole Marantz AV-7701 preamp, so it seems to be a Denon/Marantx/Pandora issue.   Good luck! ... View more