Does a son's seeking refuge with his grandfather or grandmother concerning an issue his father refused, followed by the father's approval after the grandfather's request, constitute disobedience?

The intercession of a son with his grandfather to convince his father about a permissible matter is not considered an act of disobedience (ʿUqūq), provided the father is not harmed or angered by it. The father can also convince his own father (the grandfather) of his opinion if he sees a benefit in not fulfilling the son's request. However, if the father would become angry due to this intercession, then it is considered a form of harm that falls under the category of disobedience (ʿUqūq).