Demigas

For some reason I'm having some inexplicable issue with my Asus Tuff B360 motherboard. Got everything setup and installed just fine but when I shut down at night, the LEDs of everything in the case stay on, the fans whirl (sometime nervewrackingly heavily) and I have to hold the power button to shut down fully which I know can't be good for it. I've tried stuff in the BIOs, reformatting, and so much more and I'm not sure what to do to fix it. or what could be wrong at all for that matter..