Transmission Stuck In Gear problems of the 2019 Nissan Sentra

I was coasting towards the traffic light wanting to make a left hand turn when the light turned yellow and I was already past the point where I could back up. I had to hit the gas pedal to make the turn in a quick fashion and beat the oncoming traffic. The car just puttered along and I almost got hit by the oncoming traffic. It seems like the cvt transmission gets disengaged when the car is coasting at low speeds (5-10 mph) and there is a loss of power to the wheels when I hit the gas pedal again. Rpm is 3000 and the car still doesn't move quickly enough to get out of that dangerous situation. The reason I believe that the transmission is the culprit is because when I stop at a light or stop sign and I barely come to a stop and I hit the gas pedal again, it makes a jerking motion, like the transmission didn't downshift to 1st like it is suppose to, it gets stuck in the high gear and when I hit the gas pedal it downshifts hard. I have to stop a few feet away from the light and then release the brake a little in order for it to downshift to 1st.