LOL, clearly the electric field around her brain is not strong enough to impact all the electrodes firing in her brain so why would it impact a nanite? The strength and intensity of a lightning attack specifically aimed at the nanite is far different than an electric field. Unless you are going to argue Storm can't generate lightning stronger than this electric field.
Is that your argument? That Storm is so weak that her lightning hits with the intensity of the weak ass electric field around her?
Perhaps you didn't think this argument all the way through and simply are trying too hard to find fault.