What is the ruling for a follower who was previously behind (masbūq) and the Imam errs in a part of the prayer the follower did not complete before joining?

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If the follower was previously behind and the Imam errs in a matter the follower missed, the follower must follow the Imam in the prostration, whether it occurs before or after the final salutation. This view is narrated from 'Ata', al-Hasan, al-Nakha'i, al-Sha'bi, Abu Thawr, and the proponents of the Hanafi school (Ashab ar-Ra'y).