The ruling on the rak'ah in which the ma'mum catches the ruku'

Question:
Honorable Shaykh, may Allah grant you success. He says: A ma'mum entered the prayer while the imam was in ruku', and he holds the view that al-Fatihah is a pillar for the ma'mum as well. He says: So is it obligatory for him to perform this rak'ah?

Answer:
Yes. Among the scholars, such as al-Bukhari in his Risalah, there is the view that if one misses it, he should perform a rak'ah. However, the majority hold that it suffices and al-Fatihah is dropped from him because he did not catch the standing. He did not catch the standing, and one who does not catch the standing is not required to recite al-Fatihah. This is evidenced by the hadith of Abu Bakrah, when he came and the imam was in ruku', so he prostrated behind the row, then crept forward and entered the row. When the imam said the taslim, the Prophet (peace and blessings be upon him) said: meaning, do not count it, as you entered the prayer before reaching the row. And he did not order him to repeat it.
And he did not order him to perform a rak'ah, which indicates that it suffices, because it is a pillar whose time was missed, namely the standing, so it is dropped from him in this case. Yes.