Your site now doesn't include any Open Graph Image tags. Jetpack's Open Graph tags are probably still deactivated because another Open Graph plugin is currently active.
Could you check your list of active plugins, and compare it to the list of plugins listed here:
https://github.com/Automattic/jetpack/blob/2.7/class.jetpack.php#L594
If one of your plugins is on that list, you'll want to configure it to display Open Graph meta tags, so Facebook can use that information to built its post previews.
Let me know if it helps.