2023 BMW X5 ELECTRICAL SYSTEM,UNKNOWN OR OTHER

While on a stretch of two lane highway with no shoulders I got some flashing error messages that were too quick to read, then the car made the shutdown sound like when you turn the car off, and said “Goodbye” on the screen. The gas pedal was unresponsive, pulled itself away from my foot. The screen showed what it normally shows when you turn the car off - option to charge immediately or precondition now. Car was just coasting. Eventually I hit the start button and the car turned back on. I think one of the error messages that flashed said Driver Assistance Disabled… the car doesn’t have any advanced drivers assistance packages so not sure what that could mean. I have a vague memory of this happening to me once over a year ago, pulling out of the driveway, and having to hit start to turn it back on.