Display Featured Image in Latest Reviews block

The image will not be shown if the review has not been assigned to a page.

If you don;t want the images to show on the assigned page, you’d probably have to modify the code snippet to check for that. For example, something like this:

$context['assigned_to_image'] = '';
$postId = glsr_get($review->assigned_posts, 0);
if (empty($postId) || $postId == get_the_ID()) {
    return $context;
}
$context['assigned_to_image'] = get_the_post_thumbnail($postId, 'thumbnail');
return $context;