Certain smell sources return 0 images even though they should have at least one?

[ehrhart]

From Arno:

For example, Butter returns 0 images, but we have at least one, the illustrative image of Butter itself.

How were the images selected? Is there a way to know which item in the KG do they belong to?
Moreover the query that I'm using could be wrong, although it does return results for some categories such as Bear or Artichoke

I'm not sure if this is a bug or not!