For about two weeks now I haven't at all been able to see which songs I disliked.
Normally they are "greyed out" but I can still play the songs when I press on them. Now they aren't greyed out so I can't see which ones I disliked and nothing happens when I press a song that I disliked.
Thanks for your patience!
Make sure your app is up to date, this should be fixed now :)