Walkman ZW-A55 Cover Art Issue

[erfaanjmahmoodi]

I have a few WAV albums that do not show any cover art when imported to my A-55 Walkman. 

This issue has persisted in spite of adding cover art added in Music Center, manually embedding JPEGs into music files via IrfanView, and converting progressive JPEG files into baseline (then repeating the IrfanView process), and finally installing MrWalkman firmware.

For aesthetic reasons, I wish to have my album art show on the Walkman. Where I am lost is what the exact issue is. 

[HannahEd01]

Hey erfaanjmahmoodi, I found this: https://helpguide.sony.net/dmp/nwa50/v1/en/contents/TP0002342863.html?search=album%20cover

The note says: You cannot register cover art images for playlists.