I've also experienced quite a few crashes, but there seems to always be a "tell" before it happened. Graphics behaving erratically or game slowing down. Saving, shutting down and restarting FE sorts this out for me. Managed to get a nice 10 hours game yesterday with no bugs what so ever.
I've noticed that the most quirks happen when I start a new game without restarting FE first. Maybe there's something trying to access the saved information from the previous game? A cache not clearing out?