Accrued Purchases Report

Has anyone ever seen where your Accured Purchases report shows all zeros? It works fine one minute, and then later it shows all zeros. Sometimes the report even disappears from the area page! We have a link that was created by an external vendor called “Clear AOS Cache”. That sometimes helps but not every time. It gets the report to show up again, but to fix the zeros, it doesn’t work very well. Any help would be huge. This is big waste of time for all of us.