I have added a router to the gateway modem and bypassed the ISP gateway by routing everything through a more capable router. This setup has resolved the frequent dropout issues I was experiencing with the AT&T modem alone. You can refer to my thread or consult AI for more details. I follow AI's instruction and completed the setup in a few (3) hours.
Qobuz support has already mentioned that the issue is related to corrupted CDN files. Changing the DNS address may reroute your streamer to a different address, but it does not guarantee a trouble-free connection.
My Volumio app for the Rivo Plus also has an option to input custom DNS servers, including primary and secondary. I changed them from the default OpenDNS to Cloudflare (1.1.1.1) and Google (8.8.8.8). However, the same dropout issues still occur from time to time, with similar frequency as before switching DNS.

