Shopify: Stored XSS on demo app link

Hi, I found stored XSS in apps.shopify.com in the DEMO URL of the apps you create. POC 1. go to your partner account and create a new app 2. go to DEMO link in https://apps.shopify.com/services/appsubmissions/edit of your app put the payload you see below: F374863 and when pressing on preview...