Fix Please release the power button, ... We just need a few more seconds to shut down on black background – not to worry because you’re at the right place for the solution to this issue!

On stand by/computer off (pin open) it should be 3-5V , on power Soft-on (pin shorted/power button pressed) it should fall to 0.15V (or below 0.8V) in less than 22 ms if I'm not wrong.