If successfully used Spotify Connect on Android for some time to stream music onto my Raumfeld Connector.
I don't recall when I had used it the last time, but now the device is no longer found by Spotify Connect.
I've already re-installed Spotify, but without any impact.
I don't recall any recent software updates (but they might still have happened), the only difference is that my free trial period has now ended, and not I pay for not being able to use the premium feature anymore. 😞