We are aware of an issue that causes images to not appear on some Facebook posts.
This is an issue with Facebook's page scraper. This is issue is impacting posts from dlvr.it and many other apps. Facebook has acknowledged the bug and is working on a fix.
The issue started impacting dlvr.it users on November 28th.
Facebook has indicated that their fix for this issue was implemented this morning (12/4/17).
Please email any questions or concerns to support @dlvrit.com.