Sometimes the post you share at Facebook does not deliver the data as published at your website, due to the content being cached at Facebook and your page changes are not resourced, or the scraper just ran into a conflict with the page. It can be corrected be manually running the Facebook URL scrape tool and it will clear the Facebook cache to use your proper page output.
While logged into Facebook, go to https://developers.facebook.com/tools/debug/og/object/
- Enter the URL of the page you wish to post at Facebook.
- Click Fetch new scrape information