Thanks for reaching out.
I’m not sure this would be related to Polestar.
* Are you signed up for Google Webmaster Tools? https://search.google.com/search-console/about. The Search Console will email you anytime there are crawl errors.
* Here is a thread that you might find useful. The users are discussing how to check for an image not being indexed and how to find the reason why: https://moz.com/community/q/why-images-are-not-getting-indexed-and-showing-in-google-webmaster.