I can not. AWS, for whatever reason, does not want this publicly documented. I would write up what we learned in our testing in more detail, but I have been asked not to.

You can find some discussion of this behavior in places like https://forums.aws.amazon.com/thread.jspa?threadID=231806. I originally became aware of the issue, before hitting in production, from the HN comment at https://news.ycombinator.com/item?id=18314138