I have never seen that before now!!!!

[Huib Versloot]

Mention it (and the affected entry hex number) in the test report. Usually a designer would not like to see one of the sides to be able to reach the reinforcement entry hexes at all before all reinforcements have entered. What the game engine makes of the situation, however interesting, seems less relevant IMO.
My guess is that the designer will think of something to prevent it from happening in the final version.