[Resolved] Url slug of original language custom post type sometimes is the translation

I have a site with English as an origin language and Dutch as a translation.
On that site I have custom post types with translated slugs.

The CPT's are added as follows

```
function clientname_product_post() {
// creating (registering) the custom type
register_post_type(
'clientname_product',
array(
'labels' => array(
'name' => __('Products', 'redacted'),
'singular_name' => __('Product', 'redacted'),
'all_items' => __('All Products', 'redacted'),
'add_new' => __('Add', 'redacted'),
'add_new_item' => __('Add new Product', 'redacted'),
'edit' => __('Edit', 'redacted'),
'edit_item' => __('Edit Product', 'redacted'),
'new_item' => __('New Product', 'redacted'),
'view_item' => __('View Product', 'redacted'),
'search_items' => __('Search Products', 'redacted'),
'not_found' => __('Nothing found in the Database.', 'redacted'),
'not_found_in_trash' => __('Nothing found in Trash', 'redacted'),
'parent_item_colon' => ''
),
'description' => __('This is a Product', 'redacted'),
'public' => true,
'publicly_queryable' => true,
'exclude_from_search' => false,
'show_ui' => true,
'query_var' => true,
'menu_position' => 5,
'menu_icon' => 'dashicons-carrot',
'rewrite' => array('slug' => _x('vegetarian-products', 'URL slug', 'redacted'), 'with_front' => false),
'has_archive' => 'product-archive',
'capability_type' => 'post',
'hierarchical' => true,
'supports' => array('title', 'editor', 'thumbnail', 'excerpt', 'revisions', 'sticky')
)
);

}
add_action('init', 'clientname_product_post');
```

The translation of *vegetarian-products* is added via WPML String translation and is *vegetarische-producten*

This all works well, but sometimes on the products archive page on the English site the url of a single products is hidden link;. Which is incorrect.

This also happens on another CPT

It is usually fixes by resetting the permalinks. Sometimes it needs multiple resets.

How is this possible?

Unfortunately I can't add a link because this happens sometimes and resetting the permalinks helps.