Quick report regarding upgrading the Z-Wave dongle. There are 4 securely linked devices:
2x Zooz Smart Plug ZEN06
1x Zooz 4-in-1 sensor (ZSE40) - battery powered
1x Aeotec Multisensor 6 - USB powered
First restore: only the ZSE40 of the four devices in the mesh were communicating; got many repeated Security Nonce RX events. I tried a few things based on my understanding of the log contents. Sync all didn’t help; network heal didn’t help.
Eventually, I did a second Z-Wave>Tools>Restore which appears to have fixed the issues.
All four devices are back to normal behavior as far as I can tell.
Comm. range appears to be somewhat better - subjectively; didn’t capture any quantitative data. I'm using one of the ZEN06 plugs to check range - the ZEN06 have a feature to indicate the quality of the connection.