Interesting.
Regarding the previously commented, all of us who have had a Novag VIP know that you should not press GO after entering the move. hap did it by accident, and I purposely tested it with the "physical" Novag VIP, and we noticed that this bug occurs. And I also think it is a bug, and not a user mistake, because the program should avoid this situation. Otherwise you can still play with illegal moves in the stored move train. It is absurd.

Best,
Gerardo