If the SSD reacts to the start of a brown-out with supply voltage dropping way below spec as a signal that an unplanned power loss is happening, then it may do

If the SSD reacts to the start of a brown-out with supply voltage dropping way below spec as a signal that an unplanned power loss is happening, then it may do an emergency flush and shutdown that leaves it simply waiting for power to finish dropping to zero. It makes at least some sense for the drive to not try to wake up from that state without a clean power cycle.