Airplay 2 in iOS 13.6 keeps dropping Sonos speakers
On our iPad Pro running iOS 13.6, we regularly stream music from a website via Safari and Airplay 2 to two pairs of speakers -- a set of Sonos 5:Gen 2 in one room, and an amp/speaker set connected to a Bluesound Node 2i in another room.
Airplay 2 recognizes these and offers them as devices under streaming in the Control Panel. However, after some period of time it keeps dropping the Sonos set. If I open Control Panel and tap again to reselect the Sonos pair, playing resumes. The stereo connected to the Bluesound is unaffected and keeps playing throughout.
Any suggestions on debugging this? The Sonos speakers have freshly updated firmware. Could this be a network or wifi bandwidth issue?
iPad Pro 9.7-inch WiFi