I have just tested it and it follow the exception path as soon as the set date is reached when the user interaction window is not opened or as soon as the window is closed (using closed ot submit). I think this is the behavior as designed : If the window is opened it will not close it automatically.
If my answer resolved or helped you, please mark it as Correct or Helpful to award points. Thank you! Visit http://www.vcoteam.info & http://blogs.vmware.com/orchestrator for vCenter Orchestrator tips and tutorials - @vCOTeam on Twitter