Simple problem. Spotify is just streaming music ... so CPU usage above 20% is quite high ...
Solution from spotify:
https://community.spotify.com/t5/Desktop-Windows/High-Cpu-Usage-Solved/td-p/4567876
Does not work .
So ... simple investigation will show you that problem has a name "Home screen". Any other "screen" or page is just fine.
So open info about actual playlist or album, and CPU usage became acceptable.
And of course you can minimize Spotify, which is the easiest and best option .
