Facebook has acknowledged the bug on their end, and their Engineering team is working to resolve this. We're hopeful we will see progress made by the Facebook team in getting this resolved soon. They have updated their own Status Page with the Incident which we are monitoring: https://status.fb.com/graph-api?ref=dfc
Meanwhile, this is impacting our ability to publish videos to Instagram via Direct Scheduling. We'd recommend using the Instagram Reminder flow in the meantime.
So very sorry for the disruption this is causing. We'll update this page as information becomes available.