Supplier Change Request notification not display the detail change information in worlist notification

supplier initiated change request for the promise date changing in iSupplier Portal, change request notification in Oracle worklist, when buyer open the notification link, they only can see the notification title and Response (Accept/Reject), the change request detail was disappear. when buyer go to Pending Purchase Order Changes page to open the notification, all are good. issue only happened in production system, in test system, it is ok.