How to re-establish connection?

I bought two water sensors, three door sensors, and one Z-wave extender. They all went offline. Is there a way to re-establish connection without factory reset them? It seems that Ring devices are very succeptable power interruptions. Whenever we have power outage, the devices would have difficulty reconnecting. I'm gettig frustrated with these devices. I'm considering adding more Ring devices but with these issues, I'm thinking twice.