Featured product image not showing in thumbnails

Hi David,

After some tests I noticed that variable products have their featured image also in the thumbnails of the product page, which is good. But single products don’t have the featured image in the thumbnails.

The problem arises when a thumbnail image is selected and then substitutes the featured image. This means that the user can’t select the main image again because it isn’t there anymore.

Is there a way to force all three images to show in the thumbnails?

Thanks,
Paulo