There's definitely something weird going on with bow attacks missing more than they should. I had Sebille miss 10+ attacks at 94%+ each in a row across multiple fights, and she only started hitting again once I saved and reloaded. This scenario repeated itself a couple times throughout my most recent playthrough. Something's getting stuck and not working right occasionally in the inner working of the to-hit rolls, or I need to start buying a lot of lottery tickets.