So, I understand you have problems with, for example, this product (tiramisu), whose image is available in the landing page, but not in the product page, which gets stuck with a “Loading…” message, right?
Unfortunately, I cannot help you with this. First of all, I’d need to have access to the source code of the theme to further investigate why this occurs and determine whether it is easy or not to provide a fix for it. However, as far as I know, our plugin has problems with plugins/themes that load featured images via AJAX. Usually, they don’t use the function (get_)the_post_thumbnail, but they use other (probably also) standard WordPress functions to retrieve it.
The problem we face with our plugin is that the only WordPress function into which we can hook is (get_)the_post_thumbnail; if your theme/plugins don’t use it, there’s little we can do (other than reverse engineering the theme and explicitly calling this function where it is supposed to be called).
I’d suggest you contact the author of your theme and detail your problem. The source code of our plugin is far less complex than any theme around, so he’ll probably offer a faster and much more reliable solution.
