When browsing an artist, I've been noticing that I'm frequently (though not _always_) unable to play tracks from the Popular section at the top. When a track is playing in the player, you have the album art and info in the bottom left of the app. When I double click a track in the Popular section, the artwork/info just disappears and no other info is loaded, and the song never plays (the track lengh of the former song stays put)
But if I go to the specific album and play the same song, it seems to work just fine.
The only fix I've found so far is to restart the app, but the issue seems to come back eventually.