Chances are small that anybody can (or is willing to) help you, considering you provide no useful details at all on what you are doing exactly.
And the reason that you received no replies when you first posted this some time ago claiming it to be some software bug is probably the same.
Have you done some serious forum searches? (best use google search: site:getmusicbee.com/forum/ your search terms here)
There are a zillion posts, questions and answers to be found regarding album art.