Adding reinforcements between battle stages sets losses to zero

[Seleukos of Olympia]

Some large battles give you the option of visiting the camp between stages, and there you can add green recruits to your brigades, assuming that you have enough manpower. I've only tried it once, in Cold Harbor as the Union, but what I noticed was that in the next stage those brigades that had received reinforcements had their losses reset to zero, and that carried over to the statistics at the end of the battle. It was only a minor annoyance for me, but I'm worried that it can function as an exploit, for battles where you have to lose no more than a certain percentage of your army for some victory conditions.