This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.
Most recent user affected CL: 2962397
CrashReporter User Descriptions:
Repro steps unknown. However, it seems directly related to Leap Motion Passthrough. See Additional Info URL 2
Head over to the existingAnswerHub thread and let us know what's up.