If you’re posting for help, you at least need to provide a comprehensive and detailed description of WHAT does not work, and provide all the details that might be of relevance.
All we can know from your description (on 2nd attempt) is that your machine is broken (or “hangs”) at that point in time and that you deliberately chose a custom (non-openHABian, SSD) OS+HW setup.
A machine to hang does not have anything to do with openHAB in the first place.
To answer your question, if I was harsh I’d say I expect you to google for help outside of this forum …
Well as said it’s not OH to stop working but your machine. And we’re in May now.
I am sorry, but - still willing to help - I don’t think anyone can with that little information - it’s digging in the dark.
I’d check system logs again for hints. And I’d connect a console to be prepared for logging into the system next time this happens to view/analyse the state it is in.
That’s the thing and reason why I’d suggest moving to openHABian as well.
You can but don’t have to use the RPi image. You can also install it on top of your (custom) OS as that’s Debian derived, too.