This has been happening with my device as well, even with MCU update from 2024 to the latest didn't improve the situation. Battery voltage remains stable and there's no problem with electrical system. Car starts fine; to rule out any problem with battery, I kept the car on float charger (13.6v) for 24 hours and still the device rebooted even on ACC mode.
Sometimes it starts from boot even when parked for 20 minutes. It was the case with v3.7 and even the newer beta from April 2026 has the problem. it happens randomly sometimes it remain asleep for 24 hours and sometimes not even an hour.
