Still reboots i wonder if it’s always more than likely hardwareI have the same behavior, after some time LEDs stop flashing and a permanent blue light is ON (on V1), the unit must be doing something but I don't know what (UART is not displaying anything), we should not expect anything from the manufacturer anyway
Update using the image, then remove it (to avoid flashing the update each time you plug it) and use the USB key to export the logs from the unit (use CarPlay normally for some time then plug the USB key to copy logs - it is automatic -)
For CPU scaling: https://wiki.archlinux.org/index.php/CPU_frequency_scaling