I have three WXA-50 Yamaha receivers, which are visible, but grayed out in the list Device Picker. There is a note next them: "Can't play this right now". (See attached screenshot).
I have two other Yamaha receivers (RX-A780 and R-N303), plus a Sonos and other devices that still work fine via Spotify Connect. In fact, the Yamaha MusicCast app lets me link the abled receivers to the disabled WXA-50 receivers, at which point they collectively work via Spotify Connect. It's only when I try to use the WXA-50 receivers by themselves (or linked to other WXA-50 receivers) that they are disabled.
The WXA-50 "grey out" is a recent phenomenon, but has persisted for the last three weeks. All have the newest firmware, just checked today. These both do play Spotify via Airplay from iPhone but it is not a viable option.
I saw this post from a few months ago: https://community.spotify.com/t5/Ongoing-Issues/Connect-Yamaha-receivers-disabled-in-Device-Picker/i... and the advice to start a new thread if the problem persisted.
Spotify App: ver. 22.214.171.1247
iOS and device: 13.3.1 (iphone 7)
Subscription: Premium Family
Thanks for any help you can provide!