I am not technical however happening to listen to a lecture of "Shaykh Mumtaz-ul-Haq" he bought up this very point. Surah Fatiha was given only to the prophet s.a.w and none of the prior prophets. Thus all the previous prophet's did not know surah Fatiha. However, upon the night of Meraj the prophet s.a.w lead the prayer for all the prophet s.a.w happen to be @ night which means it was bieng prayed aloud. It becomes obvious that all the prior prophets were not reciting surah Fatiha behind the prophet s.a.w as they knew not yet thier salah stand valid. Does that make sense to you brother ?