Does the prayer of one who, out of fear and not intentionally, fails to complete the recitation of Al-Fatiha in the last rak’ah of the prayer, invalidate the prayer, even though it was recited in the other rak’ahs?

The worshipper must recite the Fatihah in full, even if the Imam bows before its completion. Whoever bows before completing it, in order to catch up with the Imam, must complete it, but is not required to repeat the prayer, out of consideration for the opinion of those who do not deem it obligatory for the worshipper.