Ajax feature of adding the product to the cart.
We ran into an issue with a plugin. Please see the comment of them below.
Would you know a solution please?
We have checked and found that the theme uses the Ajax method for adding the product to the cart. By default, in WooCommerce the product page will reload once we click the "Add to Cart" button.
In our plugin, all the validation messages are added to WooCommerce default error notice method. WooCommerce shows these notices once the product page reloads.
Further, we have checked by deactivating our plugin and could see that the “Add to Cart” message which is showing after adding a product to the cart is displayed only when we manually reload the product page. So we recommend you to contact your theme developer or theme support to disable the Ajax feature of adding the product to the cart.
We hope they will be able to help you.
Ashish - ThemeHigh Support