I have one of the first 2018 3.0L, Lariat trim. I’ve noticed in the past month or two that after the truck has sat overnight occasionally the dash display will default to Trip1 (I usually have it displaying the speedometer) and the clock time will be off by an hour (DST). This morning I got in the truck (garage and Florida so not cold) and everything was dead, no dome lights, dash or console lights, nothing. I released the hood latch to jump it and when raising the hood all the lights came on. Lowered the hood and the truck started fine. It seems like if the battery were going bad the opposite would have happened: accessories on but no starter. I usually get about three years of battery life so if that holds for this truck I’m living on borrowed time but it seems like odd behavior. The only explanation I can come up with is that there are two batteries, one for starting and one to keep accessories powered when not running but that seems remote. No warnings or notifications from the app.