purchase order & invoicing bug

I found a bug in V2.3.13. After creating few purchase orders from different suppliers, I went in the oustanding order to receive them. I received the first order in and when I go to "Entry purchase invoice for this receival", I open "Enter Supplier Invoice" page with the last supplier for whom I had created an purchase order. I should have selected the supplier for whom I had just received in goods and selected to invoice the receival.