Thanks for bringing this to our attention! This is actually a brand new issue that we started tracking this morning, and I am sorry to hear it has impacted one of your posts.
We are currently in the investigation stage trying to figure out why this is happening. This may change as we get new information, but for now the workaround is to unscheduled and reschedule the post.
Because this issue is so new we don't have any further details at this time. I have tracked this for you and we will send you an email once the issue has been resolved.
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