I have a C7 running 2.3.8.125. Starting this afternoon, a lot of Zwave devices are not responding. The ones that are responding are taking a long time to do so. I also noticed a message saying "Last cloud backup failed. Failed steps: Z-Wave."
I've tried rebooting the hub, and doing a Zwave repair. Neither have worked.
Shutdown the hub, remove power for about 30 seconds (this will empty the zwave radio cache and force a rebuild on power up), and then plug it back in. Once you’re back up try doing a cloud backup.
Thank you. I tried the shutdown/remove power. That didn't work either, but I found this article and followed the instructions and that resolved the issue: