I have all GE zwave switches. They're the older ones and are not plus models. I have had no troubles with them at all. NOT to say that it's not possible. Perhaps you might want to spend the 35$ on a zniffer so that you can at least see what your routing is doing. Obviously, plus is better, and it's always possible that a bad device is the culprit. Check out this link. I have one. They're easy to set up and can provide a lot of information on your mesh.