there’s a chance that a fast power on-off-on may have left the DAC in a weird state of mid-transmission on the SPI bus and it got very confused. when power cycling digital stuff, be sure to power-off for at least a few seconds so any stored power in big caps can fully dissipate and turn everything off.
also-- a better solution to your problem would be to simply recall the preset with the button next to the usb cable. no reboot needed!