I've noticed on occasion the sword attack hangs up after using a power attack, ex. Attack with whirlwind and then regular attack immediately after . It is only a problem when my companion draws a large crowd of baddies and I can't see my character . The damage numbers only help after the companion dies and I can see I'm not making damage. I suggest two commands for companion to wait and follow , to help keep the hoards from swarming the player so fully there is no escape.