Auto refresh of Shopping cart

Hello all ,

I have a requirement that for particular vendor, in order to avoid splitting of SC we have implemented logic in BBP_DOC_CHANGE_BADI to copy Ship-to address of first line item to remaining line items in SC and make Ship-to address fields for remaining line items as display only.My code is working fine and when we Order or Hold the SC we can see address is same for all line items.

Now the Issue is When we enter address in first line item and go to second or any line item to check the ship-to address its will show old address and we have to click REFRESH manually to see new address.Please let me know how to Auto refresh ITS.