Extendware Service Desk Extensions Current: Magetno 1 Full Page Cache: Out of stock products showing as if they were in stock. How do I fix it? Magetno 1 Full Page Cache: Out of stock products showing as if they were in stock. How do I fix it? Out of stock items require the Auto-Flush add-on.This issue is resolved with the Auto-Flush Add-on. Click the link to learn more about Auto-Flush Add-on and (click on Add-ons). ×