What is the ruling on the fast of one who inhaled food vapor while cooking in Ramadan, out of ignorance that it invalidates the fast, and this happened to her many times?

The sayings of the jurists have varied regarding the steam from a cooking pot: if it reaches the throat of a fasting person, does it invalidate the fast or not? What is fatwa-approved by us is that it does invalidate it. However, if the sister inhaled it out of ignorance of the ruling, then her fast is valid and she is not required to repeat it, because the conditions for invalidating the fast by a nullifier are knowledge, free choice, and intention.