وَسَهْوُ الْإِمَامِ يُوجِبُ عَلَى الْمُؤْتَمِّ السُّجُودَ، فَإِنْ لَمْ يَسْجُدِ الْإِمَامُ لَمْ يَسْجُدِ الْمُؤْتَمُّ،
Translation: The imam’s lapse obliges the follower to follow in the prostrations of forgetfulness. But if the imam does not perform them, the follower does not perform separate prostrations alone.
A follower is linked to the imam. If the imam performs sujud al-sahw, the follower joins even if personally free of error.
If the imam leaves these prostrations, the follower does not separate from him to perform them independently. Other consequences require separate discussion.