Today morning, while driving my 2016 Suzuki GV, I pressed down on the brakes hard. From then on, whenever I pressed down on the brakes, they would apply, but I could tell they weren't fully applied because the paddle would sink deeper and the car would slide ahead. The braking fluid pressure builds up when I apply the brakes a second time, right after the first. However, even after applying the brakes a second time, the paddle sinks in even further. I got where I was going by repeatedly slamming on the brakes. Under the vehicle, I made sure there was no leaking braking fluid. Possible explanations?