TV Show covers missing / present per season

I’ve got the classic folder setup in my gDrive:
TVshows/Show.Name/Season.01/Episodes.S01E01

I only get to see the TV show cover art for each season of the TV Shows but I only see folder names when browsing through the TV Show folder list.
Is this a bug or is there a setting that I’m missing?

Is this happening for all your shows, or just a few?

Do any of your shows have multiple seasons?