I wonder if all the TCHs have this problem. Mine does it occasionally, but only if the engine starts when cold and the car is not moving. There must be a flywheel effect on helping kick the engine to start when the car is rolling forward or backward.

I don't believe the electric motor spins the engine over as fast at cold start-up as a normal starter, when the car is sitting still. Could be the TCH lean burn engine may not feed as rich a mixture at crank-up to help conserve gas.