I guess it mustve been an unclear Tile, it only happened once, right next to the Bridge, if it was a pathfinding Issue, it should've happened more often.
Flawed Protagonists are fine, but Cassius reminds me more of a Griffith-Lite, and thats a bad Thing. If I didn't know hes supposed to be the Protagonist from the Tutorial centering on him, and the reckless charge being Protagonist like, I would suspect him to desert the Mercenaries and become the Antagonist after the forced Marriage Scene. And you then leading the Mercenaries to free his Wife while also taking on the Eclipse.