The same thing happened to me. I did a ‘rollback’ with a WP ‘rollback’ plugin to the previous version about 10 min ago, it posted to FB however the featured picture did not post. I since then, 10 min later i updated to current and it only posts :
Link attachment type:
add the “%” values for picture and no picture posted.
Also, it NOT automatically posting to twitter anymore. I have to post it myself. I think there is a scripting bug.