The ruling on the late congregation praying behind a late follower

Question:
May Allah reward you, Honorable Shaykh. A poet says: A man joined the 'Isha' prayer, having missed two rak'ahs. After the prayer ended, the imam left, and the late follower stood up to complete his prayer. Then a late congregation arrived and placed this late follower in front, assuming he was praying alone. The question is: What is the ruling on the prayer of the late follower? What is the ruling on the prayer of the late congregation behind him? And how should a person handle this situation if it is not permissible?

Answer:
This differs from the first two cases. As for the first two, as long as they are a congregation, they pray as a congregation; they missed the prayer, so they appoint one of them to lead and pray as a congregation. They do not need the one who stood up to lead them in making up what they missed. He completes his prayer alone, because he is part of the first imam's congregation, so he completes his prayer alone. As for them, they establish a congregation among themselves. This is the preferred course of action and the way to avoid the disagreement. In any case, if someone does this, we do not say the prayer is invalid; their prayer is valid, but it is contrary to the preferred course and contrary to the scholars' views. Yes.