I understand what we are talking about... obviously, the hiby firmware cannot directly influence the shutdown time of the SD card when the screen is off... All that remains is to extend the screen operating time for the activity of the SD card, for example, using the following settings...

Probably, when switching to standby mode, the dap stops powering the SD card, minimizing energy costs... When waking up, the dap resumes power supply to the SD card and other components that were also deprived of power, this takes some time... just at the time when all components wake up, we see...