Tata Motors — One year old car Nexon AMT is Jerking

My car is just one year old and I recently done with 3rd service that is done after 12 months.
And right after service I am feeling so many jerks.
When AMT is on first gear and in bumper to bumper traffic then it is not smooth like before. I am felling so many jerks now.
This is so uncomfortable. Even passengers sitting in the car can experience the same.
Mob': [protected]