Earlier quoted context omitted.
How do you turn it off?
It's in System Preferences somewhere (good luck). It's the option to allow software updates while your machine is asleep.
When I saw it the first time, it was unclear to me that I can even click on it, since it doesn’t look much like a button. They shouldn’t hide such important settings in a tiny icon or at least should have made it much more apparent that it is clickable.
Couldn’t find any settings related to the closed lid though.