Assalaam Alaykum Wa Rahmatullaahi Wa Barakatuh,

Baraka Allaah feekum ya Shaykhana

My questions is in our local masjid they have it so that one Imaam will lead the first 8 rak'ah of taraweeh and then they will take a break so that the brothers and sisters who believe that one should only pray 11 can leave. They do not pray witr but just the 8 and then leave. So, these people leave and then another Imaan will come forward and then finish praying the 21. We have heard the hadeeth that the one who starts and finishes with the Imaam he gains the reward of praying the entire night. So, in this situation if one stops at the 8 would this be considered finishing with the Imaam or should one finish the 21 to gain the reward of praying all night?

Jazakum Allaahu khayran