We found that the IIB agent would not reconnect to the IIB instance after IIB was restarted. The MQ component metrics would continue to report as expected but the "IBM Integration Node" metric folder would go gray. We manually stopped/started and after a few minutes the IIB agent metric node appeared.
Release: Component: APMAGT
Provided new fix for MQMonitor.jar, contact technical support to obtain the fix.