Upon entering cazadors palace shadowheart stopped being able to enter combat, meaning she can use infinite actions while the enemies cant do anything. this has now continued out of cazadors palace.
I've tried dismissing her and then recruiting her, killing and reviving her with both withers and a scroll of revivify. I have also verified integrity of game files AND uninstalled and reinstalled the game. None of this has done anything. Please help.

She's just mastered passive-aggressiveness. She won't overtly fight with someone, just "oops, my mace smashed your face! Sorry!"