Why windows sleep activated before SteamShutdown shutdown?

[FreePhoenix888]

I have set windows 11 power settings this way: Sleep after 30 minutes of inactivity.
I expected SteamShutdown to disable right after steam download is finished, but on the morning I have found out that my PC was sleeping, not turned off. Why can this happen? Note that in SteamShutdown I have checked "Shut Down", not "Sleep"
Here are my Kernel Power logs:

Information	12/7/2023 4:22:03 AM	Kernel-Power	107	(102)
Information	12/7/2023 4:21:58 AM	Kernel-Power	42	(64)
Information	12/7/2023 4:21:58 AM	Kernel-Power	40	(36)
Information	12/7/2023 4:21:57 AM	Kernel-Power	566	(268)

I am not sure whether sleep was activated by windows itself or by SteamShutdown because I see that the game download is finished at 4:21 AM:

And sleep event occured right at the moment, not after 30 minutes after download finish. I also wonder why is the last event says "The system has resumed from sleep" whether my pc was sleeping until the next day and was enabled on 2:31 PM:

Information	12/7/2023 2:31:01 PM	Kernel-Power	130	(33)
Information	12/7/2023 2:31:01 PM	Kernel-Power	131	(33)
Information	12/7/2023 2:31:01 PM	Kernel-General	1	(5)

[akorb]

I verified in the Microsoft manual that the command I use to shutdown the machine, i.e., shutdown /s /t 0, should also work for Windows 11.

That the Download finished at 4:21 am and that the machine was shut down at 4:21 am is unlikely to be a coinsidence.
Either SteamShutdown did it, but this should have shutdown it completely as you say, or Windows did it itself.
My vote is on the latter.

I hardly use Windows anymore so I don't know about its inactivity behavior, especially not about Windows 11.
Maybe it says that 30 minutes inactivity means that no user interaction happened, like no key strokes and no mouse movement. And as soon as the machine is in idle then, i.e., no hard drive and network activity, it sends the machine to sleep.
That's just a guess, though.