I got my LC two weeks ago and had the exact same thing happen to me. The first couple of times I changed settings on the dash and in the infotainment screen, they would randomly reset next time I started the car. A few days later it just took (except for some safety options that you just cannot turn off permanently). I suspect these settings are tied to my driver profile, which is somehow tied to the Toyota app on my phone. The car and the app may have had some issues syncing when the car was new, causing my settings not to be properly saved online to my profile. So the next time I started the car, it loaded the old settings from my online profile. It's a stupid setup, especially considering that, to set up a second driver profile for my wife, she will have to share my login in her Toyota app. I know this because we had a Highlander before this and I wasted a lot of time trying to get her app to work.