Event Dispatch Thread (EDT) in Plugins Tab

Pre-conditions:
Start Netbeans IDE

Steps:

1. From menu Tools chose Plugins
2. Click on tab Installed

Current: AWT Event dispatch thread (EDT)

Stack-trace: java.lang.Exception: Stack dump
at de.qfs.lib.util.Misc.getCurrentStackTrace(Misc.java:1737)
at de.qfs.apps.qftest.client.awt.s.a(SourceFile:2272)
at de.qfs.apps.qftest.client.awt.s.stateChanged(SourceFile:1750)
at javax.swing.DefaultButtonModel.fireStateChanged(DefaultButtonModel.java:349)
at javax.swing.DefaultButtonModel.setEnabled(DefaultButtonModel.java:209)
at javax.swing.AbstractButton.setEnabled(AbstractButton.java:2092)
at org.netbeans.modules.autoupdate.ui.UnitTab.setWaitingState(UnitTab.java:231)
at org.netbeans.modules.autoupdate.ui.PluginManagerUI.setWaitingState(PluginManagerUI.java:138)
at org.netbeans.modules.autoupdate.ui.PluginManagerUI$2$1.run(PluginManagerUI.java:178)
at org.netbeans.modules.autoupdate.ui.Utilities$1.run(Utilities.java:469)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)

Expected: No issues

Additional information: The issue is not visible to the user since there's no EDT logger in Netbeans IDE by default. I've used an automation tool (QFTest) to find the issue.