I was there & seen it all, helped em build this plane... after close inspection it more than likely was radio interferance do to the ignition module placement (was placed inside the motorbox) this is the only conclusion i can come to.
i have a H9 80" cap / DA 50 the module is placed on the outside of the motorbox & with antenne all the way down i can get over 75 yards away with no glitching, where as in the case of this hare the distance was dramatically shorter in the inital range check.

any other ideas?