Entering Invoice data on received PO's should have a GL date to dictate what period the invoice belongs in.
We accrue for open po's at our month end. Some vendors do not invoice us for a number of days, but we are not able to use the vendor invoice date as it would post back into a closed period.
Our development team will review adding a GL date. In the meantime, our support team may be able to help you find a workaround. You can call us at 1-800-390-7053. Thank you.