I have 16 of the Ring 2nd Gen Contact Sensors on my home Z-wave mesh (total mesh is around 40 devices). When I look at my Z-wave mesh details the top 4 devices with the most errors are Ring contact sensors (see screenshot below). I know @bcopeland likes and uses these sensors, maybe some insight?
I've also had three sensors so far get stuck in "open" state. The only way I can get them unstuck is press the button once on the sensor and it updates the correct closed state.