No library capsule image for the demo?

[KandiPanda]

Apparently demos don't just use the parent's library capsule in the library, so if the demo doesn't have one set for its own ID too, it just shows a gray box with the text "4D Miner Demo" on it in the library.

In the meantime I ended up grabbing https://cdn.cloudflare.steamstatic.com/steam/apps/1941640/library_600x900.jpg and setting it as "custom artwork" for the 4D Miner demo in my Steam library.