Thank you for bringing up this concern and I understand how important it is to have accurate functionality for partial fulfillment for Purchase Orders, BriOz84.

When a Purchase Order is linked to a Bill, it automatically closes since this is how the system is designed. You may want to send feedback to let our product team so they can better understand how improvements to this features could benefit your business.

To request, follow the steps below:
 

1. Go to the Gear icon and select Feedback.
2. Enter your comments or product suggestions. 
   
3. Then select Next to submit feedback.
    

If you have any other concerns or any questions about purchase order, reach out to us. We're always right here ready to assist you further.