Yesterday, the dealer updated the software of the control module. The problem seems gone this morning. The transmission is very smooth now. In fact, I am very happy with this dealership during last two years. They treated the custom very well. Toyota and Honda are not my brands. I used to test them such as Camry and Accord, the driving is floating, the suspension is too soft for me. The interior looks also cheap. Honestly, both cars are very smooth.