Actual Completion date - Can you turn off auto-complete/close on task?

Is there a way to disable the auto-close function when a date is entered in the Actual Completion date field for a task? My team needs to track Actual Completion dates on tasks that are delayed or that miss the planned completion date. When the Actual Completion date is entered, the task closes which prevents anyone assigned to the task to add any additional hours. We use our Workfront instance to track time to tasks and overall monthly utilization for our project team members. Team members have up to 1 week following completing project work to submit their time. Once the Actual Completion date is entered, the task closes and team members can no longer add time to the task on their time sheet.