Album Art In WMP Library Won't Load

WMP is showing music library at opening, but it won't load any album art. It's a bit complicated to explain the problem exactly, so I will post some screenshots that you can get what I'm saying.

1) I open WMP, and at it's set to Library => Musc => All music, but it wont' load any album art. I see album name, artist, and everything else, but no album art. I tried to wait, but even after hour or so everything's still same.

2) I go to album submenu (or any ohter), and than it shows album art normally.

3) After that, I go back to All music, and then I can see album art there, as well.