Amazon Pay and WPML error with free products

Hy, when using Amazon Pay and WPML its impossible to checkout with free products ( 0 ammount). Usually Wocommerce hides the payment Gateways on free products but when using WPML and Amazon Pay the paymant Gateways remain seeable and its impossible to checkout. For us, its quite an issue becouse we are selling gift cards and its common for people to have a zero ammount on checkout.

Disabling either of these makes the checkout possible. When enabled together the payment gateways remain seeable.

The issue has been confirmed by WPML as a compatibility problem. I hope Wocommerce can get in Touch with them to solve this problem.