Answered by Shaykh Amjad Rasheed
Is it permissible to pray the Friday prayer behind a Hanbali imam who prays before the time of the noon prayer enters?
It is not permissible for a Shafi’i to do so unless one is following Imam Ahmad (May Allah have mercy on him), while observing his madhab in the rest of the rulings of prayer.
– Amjad Rasheed
(Translated by Sr Lida Kahi)