Column Summary 'Sum' shows n/a values (4313540)

It is a requirement to create a custom dashboard by drag-n-drop with "Create Table" using Hosts | All Hosts data. This custom dashboard should show a Summary row to 'sum' a value on a particular column (for example, Host -> Storage -> Space Available & Space Used). When creating this table, the 'Sum' value shows "n/a". When trying with an older FMS build (for example, 5.6.7), this data shows expected 'Sum' values.

When looking within the Foglight Management Server logs, the following can be seen:

YYYY-MM-DD HH:MM:SS.SSS ERROR   [http-0.0.0.0-9090-11] org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/console].[Portal Servlet] - Servlet.service() for servlet Portal Servlet threw exception
java.lang.IllegalStateException: Error processing action: applySummary
  at com.quest.wcf.portal.components.MinimumComponent.processAction(MinimumComponent.java:89)
  at com.quest.wcf.portal.impl.RequestProcessor.processAction(RequestProcessor.java:350)
  at com.quest.wcf.portal.impl.RequestProcessor.process(RequestProcessor.java:220)
  at com.quest.wcf.portal.impl.PortalServlet$1.run(PortalServlet.java:186)
  at java.security.AccessController.doPrivileged(Native Method)
  at javax.security.auth.Subject.doAs(Subject.java:396)
  at com.quest.wcf.portal.impl.PortalServlet.process(PortalServlet.java:184)
  at com.quest.wcf.portal.impl.PortalServlet.doPost(PortalServlet.java:67)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
...
  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
  at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
  at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.ClassCastException: com.quest.wcf.core.module.runtimevalue.impl.FunctionRuntimeValueImpl cannot be cast to com.quest.wcf.core.module.runtimevalue.ContextRuntimeValue
  at com.quest.wcf.components.portal.components.TableColumnsEditor.processApplySummary(TableColumnsEditor.java:283)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  at java.lang.reflect.Method.invoke(Method.java:597)
  at com.quest.wcf.portal.components.MinimumComponent.processAction(MinimumComponent.java:82)
  ... 83 more

This has been confirmed as product defect WCF-13958 and is scheduled to be fixed in the upcoming patch release of Foglight (tentative GA date: April 2014).