timeout notifications not updating status of notification in wf_notifications table

 Hi, we have a requirement where we had to change the timeout of the 'UMXUPWD(UMX password workflow)' from the standard 4 hours to 30 minutes. I changed the timeout of the notification and changed the end result to "Rejected" if the notification is rejected or timedout. the workflow background process is scheduled to run for every 10 minutes with the timeout parameter to "Yes" for this workflow. But still the notification remains in 'OPEN' status with mailstatus as 'SENT' in wf_notifications table. I think the status in the notification table should be 'CLOSED'. Am i missing something?

If the notification is in 'OPEN' status even after timeout, this is causing the user to approve or reject the notification whenever he/she wants.