I updated my book's cover almost a week ago, and the Amazon page itself showed the updated cover when it went live, but when I link to the Amazon page on social media (Twitter, Facebook, etc) the thumbnail that gets used is still the old cover.
Is there a way to get around this, to refresh which image gets pulled for a thumbnail by social media posts?
FB is especially bad for this. Once it gets hold of a cover image, it clings like grim death. There's a workaround, but it's complicated. I've always just let it lie, figuring it had taught me a Sharp Lesson for starting to promote on social media before my book was as good as I could make it.