Check this similar case for a hint
Thread: Album Art not showing in Folder
https://forum.dbpoweramp.com/showthread.php?25861-Album-Art-not-showing-in-Folder
In fact, for WMP question, you’d better ask for help from Microsoft Community.
https://answers.microsoft.com/en-us/musicandvideo/forum?sort=LastReplyDate&dir=Desc&tab=All&status=all&mod=&modAge=&advFil=&postedAfter=&postedBefore=&threadType=All&isFilterExpanded=false&page=1
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn.
Thanks for your understanding and cooperating.
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