Ajax add to cart launched twice

Hello!

Since few days when using the plugin the ajax call launches twice and so adds 2 products in cart, when using classical product page it only adds one.

I have one ajax with :

action: woocommerce_add_to_cart_variable_rc

1. product_id: 138
2. quantity: 1
3. variation_id: 1974

and the second one with

1. attribute_pa_type-de-massage: solo
2. attribute_pa_duree: 0-h-30
3. attribute_pa_format: format-electronique-gratuit
4. quantity: 1
5. add-to-cart: 138
6. product_id: 138
7. variation_id: 1974
8. action: woocommerce_add_to_cart
9. current_cart: 0
10. product_id: NaN

It was working flawlessly since few years but just started to bug :'(, do you have an idea to get rid of that?

Best regards and keep the good work