Aviral, i am too experiencing the same issue. Even though I idle the turbo for 1 min before starting or shutdown. This is not normal behaviour In my opinion. My dad's Mahindra used to do this. I strongly feel this is due to some issue with engine mount. Yes, the engine does vibrate slightly when it falls off but it should not be too pronounced. I tested the same thing on a friend's ddis engine and the vibration was really low on shutting down the engine. I am supposed to take my car for first service in couple of weeks, will update you on the resolution provided by ASC.