On cart page I am receiving this error in console:
Failed to load the "Magento_GiftMessage/js/view/gift-message" component
*Applied coupon code "test123" not showing in cart page summary.
However the subtotal showing correct with deducted of discount amount*.
I have disabled 3rd party modules one by one. Still no change. Maybe this error is responsible to not display Discount amount in cart page summary.