This is the conflict between the new version of WordPress and the WPML plugin.
We use default WooCommerce function wc_get_product_category_list() http://hookr.io/functions/wc_get_product_category_list/ .
This function is based on the get_the_term_list() https://developer.wordpress.org/reference/functions/get_the_term_list/ that based on get_the_terms() https://developer.wordpress.org/reference/functions/get_the_terms/ .
And problem is that get_the_terms() returns incorrect data after latest WP update.
We added a temporary fix in the child theme and use another function that gets data directly from the DB without using the default functions that I mentioned above. But it may slow down the page speed. So, I would recommend you to contact WP and WPML support to ask them to check the mentioned default functions and fix them.
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