Had similar issues. Has something to do with wake timers (see powercfg /waketimers) Sometimes caused by drivers or periphery. Good luck disabling them all. No

Had similar issues. Has something to do with wake timers (see powercfg /waketimers) Sometimes caused by drivers or periphery. Good luck disabling them all. No idea how modern sleep plays into this. The Linux hibernate turns the system off for real (battery can be removed).