I have imported a product from an 3rd party company using their app. Everything is fine, my product has images and variants. I removed some of them (got rid of few variants and removed unwanted images). However when I preview the product page I can still see some images I would like to delete, but they are not visible when I am in edit mode. Even if I click "Show more images" they are not there. This has happened on few product pages, so I believe it may be a bug.