Credit memo matching with invoice

Business Requirement:

Credit memo is matched to invoice but after the matching it ; the invoice is not showing the reduced amount (after applying the credit memo) on the invoice header

also when payment is made (pay in full or manual payment) the invoice full amount is shown. ( this is the standard functionality which is in the product)

Expectations:

business is expecting the invoice amount should show the reduced amount after the credit memo is applied.

request you to suggest any workaound

Krishna