Confirm harness is expected at the end of every case as it is due to the default setting in the flow action configurations. In every flow action of each assignment , the "Show Harness" is set to 'Confirm' by default. To avoid confirm harness at the end, configuration changes in the action tab of the flow action of the last assignment are to be made. Changing the "Show harness" from 'Confirm' to 'AutoClose' might resolve the issue. Pls have a try and let us know if it helps!