I drive a 2011 BMW 328i and the last couple weeks I have noticed an issue where when I first start up my car after not using it for some period of time(few hours) I start driving around and once I put my foot on the brake and come to a complete stop with my foot firmly on the brake the car rpm starts jumping up and I can feel my car continuously lurch forward until i release the brake. This only happens when my car is in Drive. If i switch it to neutral the rpm jump stops happening. I'm really confused about why this could be happening and if you have any insight it would be great to hear.