I wasn’t aware of this prior Win10 but it is not new as “they just released it in the latest Win10 update”. Thank you for the additional information!
However what is new to me is that this the reason my test system used to black out, with no other option than powering off because the GPU reset shortcut isn’t working either. And this is unexpected a HDD waking up from sleep is causing the system to locking up this way.
PS: I’ve added HDD in the title so that it is less confusing.