Thanks for the reply. Indeed it is. I even read through the official documentation on collisions to see if I missed something, and my setup looks right. My problem isn’t that the events are not triggering, the problem is that a beginoverlap and endoverlap are triggering per frame, which makes them essentially useless.
I did find a bug report UE-36103 for the Leap Motion system that had the exact same issue, but it was marked as Will Not Fix, and no details or workaround was given in the appropriate thread.