Shipping Display Error After Coupon Insert

[GGDStore]

Hi, I have a free shipping to Eur 70 of order. If customer insert coupon code discount is applied to cart but cart display payment Eur shipping too.
For example: customer insert in cart Eur 80 of products, insert coupon code discount, discount is applied but shipping cost is displayed too but not calculated.
Customer receive email also with shipping cost.
Can you resolve this error?
Thanks.

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