i think there is a small bug displaying the cover.
If there is a highcomma character either in the meta and/or in the filename and/or in the folder name (for example: Me’Shell, Y’Akoto, Director’s Cut …)
the cover will not be displayed in the “compact view” while playing.
I don’t know the exact name of this view but it is the view on mobile or if you resize the window on the desktop browser.
The thumbnail of the cover for folder, file , artist is displayed with no problem in every view.
It happens on Firefox and on Chrome Browser on mobile devices an on desktop.
Thank you very much for your help