Try to put my PC to sleep? 1 of 3 things happens: it either goes to sleep normally, it goes to sleep but wakes itself up 2 seconds later, or the PC actually just shuts down.
Try to shut down my PC? 1 of 2 things happens: it either shuts down, or it restarts.
The only way for me to keep my desktop off all night is for me to switch off the power supply or unplug it, sleep, hibernate, flat out turning it off, all result in a bright ass screen waking me up at 2am
There was a video from LTT not too long ago where they contacted MS about the issue. It's supposedly due to device manufacturers not implementing the spec properly so they ended up giving up on it.