Found the problem. May I suggest that you move FEATURED IMAGE to the top. It’s way down the bottom and unlike other themes, this theme (as beautifully designed as it is) doesn’t get it’s image from the post insert.
When I finally found featured image issue from a google search (not from your forum) I kept scrolling and lo and behold there it was way down there. If it’s such and important, and unusual need, you really have to call attention to this.
I almost didn’t use this beautiful theme, just because of something that simple.
again, overall, a GREAT THEME. But I think you need to make that more obvious.
The Featured Image option is actually a core feature of WordPress, and the theme just makes use of it.
But thanks for your suggestion. In future updates, the theme will automatically pick an appropriate image (in terms of size and aspect ratio) from among the images uploaded for the post, if there is no featured image set for that post.