Alignment and balance? Perhaps. in my case, I did not take my hands off the wheel at any point. I did use a light touch. I will continue to observe and learn.The ping pong effect is mentioned at the owner's forums and attributed to tire balance and alignment. My car is perfectly straight and handles curves with no issues. The display shows you if it can see one or both lines. I touch the steering wheel occasionally to keep the warnings at bay.
Adaptive cruise has its place, not for everything, and I also love it. With MPG in mind, when I see traffic slowing or stopping ahead I hit the on/off cruise button; The reason for this is that the car will continue to keep its set speed until it decides to slam on the breaks. As a sidebar, setting the following distance at two or more bars will provide a better and smoother breaking. I also turn it off when getting ready to take an offramp. Turning off the cruise will allow a more normal human behavior besides getting back some of the car's kinetic energy. The breaks will also benefit. Once the traffic begins to move you should hit the lever once and then the cruise control will assume the same speed setting in use prior to being rendered inactive. Stepping on the break changes things not covered here.I am in the middle of a 1700 mile road trip and we used lane centering /adaptive cruise for about 80% of the whole trip. I keep my hands gently on the steering wheel most always and my feet on the floor and find the car adequately in center of lanes ( not perfect but I’ve grown to trust it to Re - center the car each time it pings a bit ). Driving Interstate 95 often in bad traffic. Terrific challenge for adaptive cruise. Awesome response. I am totally relaxed after hours and hours of driving. This is a game changer. And I am consistently getting 29.7 mpg ‘s on a 2020 Outback XT Touring because I use adaptive cruise . Fabulous riding car .