People have reported losing points when resigning under 2 moves in thematic tournaments. The cause has been discovered.
This will only occur when it is a thematic, your opponent is black and moves first, and then you resign. (The original code not being designed to support thematic, and this is a subtle bug that reflects that.)
Now, the issue remains, that resigning tournament games, regardless of the number of moves, should penalise players anyway. (IMHO)
Now, it is evident this has not been the case for a couple of years, so I am happy to leave as is (with above bug fixed). But if people feel differently, then please let me know.