You are assuming that Ivy controls each and every action of her mind controlled victims. That's not how her powers have ever worked.
She gives an instruction and the mind controlled people go off to accomplish it under their own power. It's not like she is piloting them like a mech or driving them like a car. Her own reaction times dont factor in here and quite frankly never have. It's not even telepathy she controls them with. Unless this instance is somehow different? I admit I haven't read it.