Hi @amayer
Welcome to the Sonos Community!
I haven’t heard of this before, and was unable to reproduce it myself (a couple of colleagues tried too).
I’m doubtful that there’s much I can suggest that will help, but I recommend trying a reset of the Sonos app, just because it is easy. Restart the app afterwards, and choose Connect to an Existing System.
The music services are responsible for the search results, however, and the link to Spotify is retained by the speakers and not the app, so removing your Spotify account from Sonos and adding it again may also help: Remove a music service account from Sonos
You could also try disliking (Thumbs-down) the track in the Spotify app - perhaps that will remove it from your results.
Failing that, I can only recommend contacting Spotify, but I would not be surprised if they direct you back in our direction, seeing as the Spotify app doesn’t do the same. They may be able to do something to your account, however.
If anyone else reading this is able to reproduce this issue, please let it be known by posting here. Thanks.
I hope this helps.
"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein