Comment by da_chicken

Yeah, I got them mixed up. Actually I mixed up S3 and S4, too. I just hit the wrong key.

Microsoft's Fast Startup is also known as Hybrid Shutdown. When Modern Standby is enabled, a system shutdown will log the user off, then use a combination of S4 Hibernation and S0 Standby.

https://learn.microsoft.com/en-us/windows/win32/power/system...