I've been replaying this game (for transferring purposes) and right now, I'm at chapter 13.
First time, I move my units and then, some stupid myrmidon decides to kill Astrid. Restart. Second time, I move my units and the same myrmidon kills Astrid AGAIN. But it wasn't that big of a deal since it was just on the first turn.
Third time, I'm doing really well, and am about to kill Norris. Then I stupidly attacked him with Astrid (he had very little HP and I wanted Astrid to level up). Not only did she not do any damage, but Norris attacked two times and killed her. Restart. Fourth time, I'm doing really well (again) and I'm almost killing Norris, but I delay it because I was afraid it would end the chapter (I still had one more chest). Suddenly he runs off to the other side of the ship and kills Astrid. I turn it off furiously.
Fifth time I'm playing that chapter, just an hour ago. I was also doing really well this time, but then I attacked a myrmidon who had a Killing Edge with my Zihark and the myrmidon did a critical on him. Stupid thing is that my Zihark also had a Killing Edge and I was hoping he'd kill the myrmidon but he didn't. Restart. Sixth time, every enemy unit except four ravens and Norris are dead. The Tibarn scene ensues, and then the game freezes on me during that cutscene!
This is seriously ridiculous. Some force from above does NOT want me to finish this chapter!