Cast Exception while passing list to bonita Actor filters

i'm using Bonita 6.3 version.
For an actor filter i'm passing java.util.List as input parameter (List is allowed in data input session).
But upon build i'm getting the error
"org.bonitasoft.studio.model.expression.impl.ListExpressionImpl cannot be cast to org.bonitasoft.studio.model.expression.Expression"

Full Trace of Error:
org.bonitasoft.studio.model.expression.impl.ListExpressionImpl cannot be cast to org.bonitasoft.studio.model.expression.Expression
org.bonitasoft.studio.engine.export.switcher.FlowElementSwitch.addInputIfExpressionValid(FlowElementSwitch.java:499)
org.bonitasoft.studio.engine.export.switcher.FlowElementSwitch.addUserFilterToTask(FlowElementSwitch.java:493)
org.bonitasoft.studio.engine.export.switcher.FlowElementSwitch.caseTask(FlowElementSwitch.java:479)
org.bonitasoft.studio.engine.export.switcher.FlowElementSwitch.caseTask(FlowElementSwitch.java:1)
org.bonitasoft.studio.model.process.util.ProcessSwitch.doSwitch(ProcessSwitch.java:1206)
org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:53)
org.eclipse.emf.ecore.util.Switch.doSwitch(Switch.java:69)
org.bonitasoft.studio.engine.export.DesignProcessDefinitionBuilder.processFlowElements(DesignProcessDefinitionBuilder.java:151)
org.bonitasoft.studio.engine.export.DesignProcessDefinitionBuilder.createDefinition(DesignProcessDefinitionBuilder.java:130)
org.bonitasoft.studio.engine.export.BarExporter.createBusinessArchive(BarExporter.java:100)
org.bonitasoft.studio.engine.export.BarExporter.createBusinessArchive(BarExporter.java:91)
org.bonitasoft.studio.engine.export.BarExporter.createBusinessArchive(BarExporter.java:170)
org.bonitasoft.studio.engine.operation.ExportBarOperation.exportBar(ExportBarOperation.java:118)
org.bonitasoft.studio.engine.ex.operation.ExportBarExOperation.exportBar(ExportBarExOperation.java:48)
org.bonitasoft.studio.engine.operation.ExportBarOperation.run(ExportBarOperation.java:106)
org.bonitasoft.studio.engine.ex.ui.ExportBarExWizardPage$3.run(ExportBarExWizardPage.java:126)
org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)..

Could you please help me on solving the issue

ThankYou