Yes, we have tried but we had to cancel our game.
I could reproduce the error also in other scenarios, creating a false pbem and sending myself the file.
It happens with full FOW, reports only, chemkin mod (but we have tried without, and we have had same result). Against AI, no problems.
After a few turns, some austrian units - not french - start disappearing, expecially when stacked with other units
It's a pity, really! The game is very beautiful, and unique, and pbem mode would be best way to play it!!