Luke 2:43
"and as they were returning, after spending the full number of days, the boy Jesus stayed behind in Jerusalem. But His parents were unaware of it,"
Does Jesus' behavior in the temple as a youth indicate He was delusional?
Children wandering away from parents in public places is so common as to be a stereotype, and we would hardly be surprised if parents express concern. At the age Jesus is portrayed, young boys were expected to show themselves able and willing to cut the apron strings, so to speak.