WC Ext Coupon Features Pro: 2.4.1
When a coupon gives a discount (fixed dollar or %) AND free shipping, the discount dollar amount is NOT displaying in the coupon line in Cart Totals. Instead, it just says “Free shipping coupon”. However, the discounted dollar amount is being removed from tax calculation and Total.
If the Free Shipping option is unchecked, then the $-discounted amount does display.
On looking at similar coupon from 2017, the discounted $ amount DOES show in coupon line in Cart Totals and says: -$120 Free Shipping Coupon.
This seems to have happened since last WooCommerce update but not 100% sure of this.