Hi MC -
Good News, sort of at least, I was able to finally get a successful reproduction of this issue, UE-11933, that was running at 100% repro. I have added the information to the bug report and now it should be a matter of investigating a solution to the crash. It looks likely though that a fix will not be in place until (at the earliest) 4.8. As soon as I hear anything more I will let you know.
Thank You
Eric Ketchum