Brake Sensor problems of the 2019 Acura RDX

Driving vehicle est 40mph, straight road city right lane. Car ahead of me (est 2 + car length) turned right,and was no longer on the road I was driving, my vehicle slowed down. I did not press brakes or change drive to neutral. There was no input from me to change vehicle speed. "space reserved" bars use radar to keep designated space. There were no bars for a safety margin. No lights or indicators display on dashboard for reason of deceleration. Normally if I am close to a person who is turning off the road, sensors may detect than and flash brake brake on the dashboard. This same braking when a person turned has occurred when I was in the left lane city road westbound . That vehicle was approaching me, a 4 lane wide street. I was on the left lane of my divide, the other vehicle was in the right line of their divide eastbound. That opposite vehicle was turning right, my car slowed down although the other car was twice as far away compared to the right-turn complaint above. No input from me, no dashboard warnings, too far away to be considered a safety issue. Another occurrence: was driving straight, est 20mph city road. . Came towards a small dip in the road, est 3' wide, shallow. No vehicles on road. Car slowed down, no indications. I stepped on the gas, no response. Pressed drive button, no response. After getting over the dip, I pulled to the side of the road. Turned car off and restarted, drove correctly after that. Used same road to come back, car handled dip in road appropriately. Summertime drive. Separate issue: brakes are squealing when I drive car at low speeds. City roads, varied speed limits; 25mph to 40mph. Reversing out of parking, press brakes, squeal. Drive to stop sign, squeal. Drive from that stop sign in straight line, city road, come to stop sign, does not squeal. Environments are different; using vehicle in -15f temp up to 85, 90f.