Vera Plus - Missing Devices

Noticed tonight that two switches seemed to have dropped off my configuration unexpectedly. How does this happen and do I have to unlink and repair to add these back? I absolutely did not manually remove these.

Both are latest GE zwave plus wall switches.

Hi–

I have had the same problem. Devices that have been on the desktop UI for years have disappeared completely (including the entire room of devices). Thoughts anyone?

Z