If you didn't do so already, you may want to create a case by visiting support.hubitat.com, as you've done in the past. But since you've reached out here, and already had a case on file, I went ahead and looked at your hub.
So not sure what a backup failure has to do with this issue - please educate me. The failure (i.e. Zwave radio stops working) occurs during the day at random. It will be working fine for days and then just dies mid day, several hours after backup times. thank you again jj
One more bit of feedback - the C8 that you saw that failed the backup last night is the one that had the Zwave radio go to sleep. The radio stopped working yesterday afternoon but i was not at home. It wasn't until this morning that i was able to do a shut down and remove power. thx j
When you power cycle, you're actually shutting the hub down first before pulling the plug right? If you're just pulling the plug to power cycle, you could make things worse with database corruption. Just an FYI is all.