[rules-users] [droolsflow] Flow is Stoped

Hi I Have a flow as folow: Start -> First_HumanTask -> Split -> [Join -> Second_HumanTask] or [End]. When i Create one instance of my flow, this runs fine. But when i have many instances of my flow (Size of StatefulKnowledgeSession > 1), and finish the First_HumanTask the flow stoped. (Not Create de Second_HumanTask, and not throws error) In my split node i check a fact passed to flow as: TicketBean( status == TicketStatus.IN_PROGRESS) Whats wrong? Thanks