I downloaded and installed your theme yesterday. All is working great. I added a new post today with a feature image but when I published it - I cannot see the Featured Image?
I can see the featured image on past posts so I'm a little puzzled. One hiccup that occurred and may be useful to know is that I mistakenly published the post without a title at first. Then went back and added a title and republished. I also changed the slug and tried removing the image and adding it back. The post still uses the default header image.