As long as the MacBook isn't connected with the charger and any running app won't allow to go into stop, this behavior is normal. If you want to keep it running, you have to enable Power Nap, but it will drain the battery pretty quickly.I did upgrade to Ventura with open core. But now the wifi disconnects every time the screen goes to sleep. Super annoying.
I’ve tried every fix recommended online with no success. I’m hoping the next ventura update fixes this glitch. If it doesn’t I might downgrade to Monterey to see if that helps.