Instagramers: Your photos may not be posting to timeline OR your news feed but will just go into an instagram folder at Facebook. IG is aware of the problem but seems more focused on the News Feed portion. My IG pix stopped posting 2 days ago and do not post to either the news feed or the timeline.
Here's the dets from IG: http://help.instagram.com/customer/portal/articles/493007-facebook-news-feed-share-not-working
I discovered that you can manually force instagram to post to your Facebook Timeline.
Click Activity Log:
Scroll to find your Instagram photos which did not post to your timeline.
Next to the icon as to who sees them is a circle, click on the circle. Change Allowed on Timeline to Shown on Timeline.You will need to do this for each item that is missing from your timeline.
Another way to see just your instagram photos:
You will still need to choose shown on timeline.