Wyvern, I believe I know what programme you mean and saw similar things in the same aeroplane in the few hours I got to fly the prototype.
However, my recollection was of generally poor stalling characteristics - a tendency towards severe wing drop and some tendency towards an incipient spin. I don't recall it showed a particular tendency towards consistently dropping the same wing?
That is fairly unusual. The project I mentioned showed that, but I can't recall any other aeroplane which showed such a tendency towards always dropping the same wing when otherwise happily in balance?
G