Brakes were not 100% responsive starting in summer 2019; vacuum pump was replaced pursuant to recall in late 2019 and software error related to braking was addressed by dealer in january 2020. customer stated to dealer that brakes are still not 100% responsive, and that brakes will pulse a few times when pressed and before the vehicle actually starts to stop. dealer refused to consider that existing issues with last two recalls in 2019 related to brakes could be causing non-responsive brakes.