Missing Album Artworks in Album view in Music iOS

Apple updated Music App in iOS 6.

New interface Design but a new bug appear some album artworks are missing when we go in the Album list view.

But when you select an album, the artworks appear well and also appear in Cover Flow.

The album artworks are missing in Album list view only.

The problem seems to come from the option : Convert higher bite rate songs to xxx kbps AAC in iTunes

I just tried with the bit rate 192 kbps : some album artworks are missing in the Album view list

So if you want, you can test with the other bit rate and post if you have the some problem.

I uncheked the option Convert higher bite rate songs to xxx kbps AAC in iTunes, I resent my music to my iOS device.

Now all album artworks appear well in the Album list view.

In hoping this can help anyone.