Fiori App Track Purchase Order List Loading Issue

Hi All,

     I have configured the FIori App Successfully. But the list on the master page is empty. Only on search the PO List is shown in master view and corresponding details in Detail View.

Onload, there are no PO list displayed. On Browser Inspect Element it is showing - 304 status error.

What could be the issue. Is there any configuration missing?

Thanks,

Divya