When shift the gear from P to D or R, it give jerks intermittently

I’ve 2015 Honda civic automatic transmission. I’ve had engine light on and saying check emissions systems and transmission check. After that I booked the appointment with Honda dealership and they diagnosed it and found the transmission fluid was low. In fact, they recommended me to do 3 flushes of transmission and left axle seal needs to be changed.

The seal and fluid has been replaced and I found something wrong when I start my car and shift the gear from P to D or R it giving me jerk intermittent sometimes and also rpm does not synchronize with acceleration speed as well.

Anyone knows what could be the problem ? As mechanic said transmission is good.