I have a network-wide pi hole and I noticed that it requested activity.windows.com, a url blocked by my pi hole, even while my pc is suspended. I pinged 10.0.0.217 and it is currently unreachable. So, somehow, windows pc’s turn on networking, phones home, and turns off even while suspended.
Creepy behavior
It was not in my case, the wakes happened when my router or HA controller scanned the network. Changing wake on magic packet (already had wake on lan disabled) remedied it for me.