Prayer: Should One Recite Aloud When Behind the Imam in Ishā’s Later Rak‘ahs?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: Should One Recite Aloud When Behind the Imam in Ishā’s Later Rak‘ahs?

English:

Question #568:

Does a person have to read the Fātiḥah and another chapter loudly when he is doing his second rak‘ah while the imam is in his third or fourth rak‘ah of ‘ishā’ prayer?

Answer #568:

It is obligatory for him to read them quietly.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer