USB interface

Question

In the SVT stage of notebook development, I found a phenomenon of USB A and hope to find the answer here:
Phenomenon description: In the S0 state, click the pop-up U disk on the system interface—click restart—the U disk in the S0 state is re-identified
In the S0 state, click to eject the U disk in the system interface—click to shut down and then press the power button to turn it on—the U disk in the S0 state cannot be recognized
Is restarting more thorough than shutting down and turning it on?