Delivery Creation Date is earlier than the Scheduling line date in SD Sales order

Hi experts,

I have received a issue in SAP Sales order --> Delivery creation. I have received a case from the customer where

delivery creation date is earlier than the Scheduling line date in the sales order. In Quality landscape

when I tried I am not able to replicate. I have attached screenshots.

Consignment Order

Delivery Creation date in 07th Jan

Scheduling line date in the order is 08th

As per standard the Delivery creation date should be equal to Scheduling line date in SAP Sales order .I am not able to figure out this deviation in some of the orders. Please help

Thanks and Regards

Arvind.