The ruling on the prayer of one who forgets some verses of al-Fatihah, is corrected, and repeats it correctly

Question:
(peace and blessings be upon him). The questioner says: A few days ago, in the 'Isha' prayer, the imam forgot some verses of al-Fatihah in the first rak'ah, and in the second rak'ah he also forgot some verses of al-Fatihah. He was corrected, so he repeated al-Fatihah correctly. What is the ruling on his prayer and the prayer of the ma'mum (those praying behind him)?

Answer:
If he returned to al-Fatihah, he made up for it and also performed the prostration for forgetfulness; his prayer is valid. However, if he did not return to al-Fatihah or the verses he left out, then if he remembered immediately or right after the taslim, he stands and performs a complete rak'ah. But if the time has passed and a period of time has elapsed, the entire prayer is repeated. The imam repeats the prayer, and whoever is informed of the matter repeats the prayer. As for whoever was not informed and did not know, he is excused due to ignorance. Yes.