I can confirm that I’ve also been seeing this happen recently - automations that keep running indefinitely.
Most often if happens when I’m running automations that turn off lights for a specific floor of my house. There are a bunch of zooz zwave light switches on each floor that I’m trying to turn off. Sometimes these go unavailable (thanks 700 series stick), and I’m not sure if that’s what’s causing the automation to freeze or what. I’d rather the automation skip over the dead devices and keep going, but devices that aren’t dead won’t get turned off once the automation freezes.
This is a new behavior in the last month, and I haven’t changed these automations in a while…
