Incidents are updated daily by the system and are not closing after the expected 5 days. 

Kingston Patch 8

There is an inactivity monitoring running every 8 hours and each time it runs, a scheduled job is fired and updates the incident from the system. As there is a recent update to the incident, the incident auto-close business rule will not run. 

Add a condition on the inactivity monitor to not run when the incident is resolved.