I had the unresponsive/slowdown issue with one of C-5 hubs, but not the other C-5 or the C-7. Here's what happened along with what resolved the issue (edited from a PM sent to someone):
I've had a tough time updating my Hubitat C-5 that only has zigbee devices (mostly Xiaomi - admittedly unsupported). The z-wave radio was disabled on this C-5.
- After the update, the hub slowed to a crawl. The Xiaomi devices threw an error. But all my zigbee devices (even the ones on the compatibility list) were unresponsive or very slow to respond. So was the web interface.
- So I rolled back to 2.2.2.119 - everything worked fine again.
- Repeated the process of updating 2.2.3.118. Same problem again. This time, I decided to download the latest backup, do a soft reset and restore the backup. Hub remained excruciatingly slow (device response and web interface).
- So I rolled back to 2.2.2.119 for the second time - everything worked fine again.
- Then I updated to 2.2.3.118 a third time. Same issue again. This time, I used the Diagnostic Menu (8081) to shutdown the hub. Disconnected power. Powered it back up again. Same problem (extremely slow device response and web interface).
- So I rolled back to 2.2.2.119 for a third time - everything worked fine again.
- On a lark, I decided to enable the z-wave radio and then run the update to 2.2.3.118. After the update, everything worked perfectly.
Since then, I've disabled the z-wave radio, removed power, and booted up again. Everything still works fine. So, for whatever reason, this platform update put my zigbee-only C-5 into a funky state if the update was applied when the z-wave radio was off.
