I never drove the car in flooded water. I am in Islamabad and there's no flood situation here, at least in my area.
The jerks are like clutch is slipping and not able to pick/accelerate properly. Then I have to release the accelerator and press is gradually. This happens only on cold start in the morning on rainy day when 1st gear is used for the first time for that day. Right now, my guess is it's due to moisture. I am putting the blame on clutch because the engine do not have any missing problem.
BTW, the car is not new, so I cannot buy extended warranty. It's 2019, but only 12,000 km driven.