Mercedes C200 W205 — 9G-Tronic Gearbox Harsh Shifting

My 2016 Mercedes C200 W205 with the 9G-Tronic transmission is shifting harshly, especially the 1-2 and 2-3 shifts in stop-start Colombo traffic. It feels like someone is kicking the car.

Is this a known issue? I've heard about a transmission software update that Mercedes released. Has anyone had this done in Sri Lanka?

The car has 70,000km and the transmission fluid has never been changed.