Just like the original FE, LH doesn't seem to like certain turn ending conditions. Can play for hours with no problem, then will abruptly crash, just before successfully doing Autosave to end the round. So have to repeat from previous Autosave. (Fortunately, I've learned to set Autosave to 1, so only lose one round of turns.)

What's interesting is that when this happens, there is a fairly high probability that repeating the turn will crash it again.

Maybe has left graphics card in corrupted state, since rebooting PC usually fixes it.

But why I suspect there is something about the current state of the game, is that it will then happen again a few turns later. Yet after a few repeats of crash, crash, ok fine I reboot, only to crash again a bit later... eventually the problem stops happening, and can play for hours again with no problem.

Windows 7 64-bit, Nvidia GeForce GTX 680.

(On the original FE, I also saw this happen repeatedly on a different PC, with a different graphics card. Haven't tried LH on that other PC.)