Is it true that Hudhayfah saw the Prophet (peace and blessings of Allah be upon him) praying Dhuha eight rak'ahs, in which he prolonged them, as narrated by Ibn Abi Shaybah?

The hadith was narrated by Ibn Abi Shaybah from Hudhayfah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) prayed Duha eight rak'ahs, prolonging them. In its chain of narration is Muhammad ibn Ishaq, who is a mudallis (one who practices tadlis) and he narrated it using the 'an'anah (saying "from" rather than "I heard"). Ibn Ishaq narrates it from Hakim ibn Hakim, who is a disputed figure. Al-Hafiz Ibn Hajar considers the hadith authentic.