Perplexing power on issue help request

What OS are you running and do you remember if you made any changes to the system
around the time the issues began? Hardware, software, OS updates etc.

Sleep/hibernate issues almost always come down to an OS or BIOS issue, often a
combination of both, ie. an OS update breaks it but a BIOS update is required to
fix it. I had similar issues with several of my own systems, in fact, it got so
frustrating I stopped using sleep/hibernate at all. I would fix the issue only to
have the next windows update break it all over again. This was in the early days
of Ryzen however so it was really bad.

These days it's usually just a stale/unmaintained OS. A simple way to rule out
software/OS is to boot the system from a USB linux live distro and test the
sleep/hibernate functionality. If it works, odds are, you need to update your
OS, or reinstall if it's been in use a long time. If not you can post back here.

Just a shot in the dark but you could try replacing the CMOS battery. A weak/dying
CMOS battery can cause all kinds of gremlins. If that doesn't help you can open
a support ticket with ASRock and inquire with them, share a link to this thread too.

https://tw.asrock.com/events/tsd.asp

Good luck and let us know how it goes