Kindly refer to the following link(s):
Imam makes mistake in Fatiha, can I Pray behind him? Dogs when going to masjid, what to do?
The Imam doesn't recite the Fatiha properly, is my Prayer invalid?
Does Mispronouncing Surah Fateha invalidate the Prayer (Salah)
If imam mispronounces Surahs, is my prayer behind him valid?
Ruling on making pronunciation mistakes during Salah / Prayer | Sheikh Assim Al Hakeem