Servers missing in system update

Using the latest OME. After successfully applying updates to a server it tends to disappear.

Pie chart reads 21 compliant, 24 non-compliant.

Compliant tab lists 21 servers.

non-compliant tab lists 11 servers, they disappear from here after successfully updating, but they do not appear in compliant, nor does the pie chart change.

There are no servers under the non-inventoried systems.

Where are the missing servers? How do I fix this?