My computer occasionally wakes up from Standby.
I have a USB-based KVM switcher providing mouse and keyboard. When I want to put it in Standby, I first switch the switcher to my other computer, then I go into Standby by pressing the power button. When I want to use the computer again, I first switch the switcher back to the computer, then press the power button.
Waking up from Standby spontaneously is not a major problem, as it is set to go back to Standby after several minutes. But I'm curious as to what might be happening.