Does pyb.stop() casue disconnection of openMV from PC?

I am playing with openMV4 H7 plus, trying to set openMV to a low-power mode by using pyb.stop(). Seems to me that when it runs to this code, pyb.stop(), my openMV always disconnects from my PC.
Have tried on both macbook and windows, all the same. Can anybody expain to me what caused the problem? Thanks in advance

USB is disabled in these low power modes.

Ah, I see. Thank you, man