I just purchased a new 2021 Silverrado Custom 2.7L. Standard audio system with 7" touch screen. When I turn the vehicle off and come back the next morning the volume is all the way down when I start the vehicle. I turn it back up to level I want it, but when I shut down it ends up set to 0 when I start the truck the next time.. I've set the "Max volume at startup" level to the middle of the scale, but that didn't correct the problem. It does this when using both the radio AM and FM, as well as BT from my phone. Is there another setting that I'm missing?