This bug has been present at least some weeks now. If I listen music from a playlist and it runs out of music, Spotify goes to some sort of loop that hogs 2 of my cpu cores completely. I have the "autoplay similar songs when your music ends" set to off, so it should just be paused there. If I manually pause something, it's ok.
Version is 1.0.**bleep**.336.g7edcc575
Since apparently you have some sort of filter here, in the place of "bleep" there should be a 6 and a 9.