The previous hadith has also been narrated with this mention.
I can only think that he or his shaykh was mistaken in mentioning that Mu'adh heard it from his father; as for Isma'il al-Qadi, he is too eminent for that. And Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5930