Update Fails Download

Well it is very intermittent so does not occur more than a couple of times a week. One issue that seems to be more often is the Basement Motion sensor triggers a rule that turns on the lights in the basement. Sometimes there is a couple of seconds delay or even ten second delay. But again very intermittent. The sensor is a monoprice motion sensor and the switches are Linear switches. I have to poll these to update the status so that adds some additional traffic as well.

Are these not zwave plus devices?

They are not. I have quite a few of non-plus devices. I started with a Vera hub and moved over to HE about a year ago, so most of my installed devices are non-plus devices.