This is associated with the 10-18-2019 release.
I don’t think the Save for changing a static ip is working. It doesn’t appear that it ever makes it to the volumio_data /dyn/etc area properly.
It will appear to work, until there is a reboot.
In fact, on usually it will either go back to the old IP address, or not even have an ip address entry for eth0.
I gave up on it at this point, and went with dynamic ip addresses, but would prefer static.