I am constantly chasing this issue. I have three devices (was one yesterday) and will have more later today. If I run a heal I will get more. If I run “update neighbors” the device will show 40+ neighbors but cannot communicate to the device??? … 2 are GE dimmers one is a Leviton VRCZ4-M0Z.
Well, I ran a heal and I now have 16 devices failed to configure… I just purchased 2 Vera Lite’s and am breaking up the network to 3 zones. Will report back if this solves the zwave instability…