Can´t connect to Sonos with spotify on android

[spinatsuppe1]

Plan

Premium

Country

Germany

Device

OnePlus 3

Operating System

Android 8

My Question or Issue

Since months I can´t connect to Sonos with the Spotify Android app. In the connect section I don´t see the Sonos devices. If I connect via the Windows App there is no problem and I can see the devices in the Android app too while the windows app is open. If I close the windows app the devices disappear in the android app. I tried everything: restart Sonos, Spotify and router, reinstall Sonos and Spotify. The only solution is to downgrade the android spotify app to 8.4.24.871. But this not really a solution.

Best regards

Heiko