Problem with music cover art

[rmongiovi 0]

When I set up my music library I named all my cover art as the folder name dot jpg.  They all display fine on the emby dashboard and on the emby roku app.

I just got a WiiM ultra which can display cover are, but it doesn't understand that naming format.  It wants the cover art to be named literally "album.jpg" or "cover.jpg".  There are also a number of other alternatives.  When I do that, the WiiM ultra sees the cover are but the emby app starts displaying the cover art as a collage of four copies of the cover.

Does anyone know why emby is doing this or how to work around it?  Thanks.