Woocommerce random image in product archive not working

Hi I have a snippet that is supposed to replace the default archive thumbnails with a new one.

remove_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10 );
add_action( 'woocommerce_before_shop_loop_item_title', 'vista_replace_product_thumbnail', 10 );

function vista_replace_product_thumbnail() {
        global $product;
        $attachment_id = $product->get_gallery_attachment_ids(
		array(
        'orderby'       => 'rand', //random order
    )
		)[0];
        echo "<img src='" . wp_get_attachment_url( $attachment_id ) . "'>";
}

The following line is failing to remove the existing thumbnails. But the rest of the code is working.
remove_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10 );

Does the enfold product archive page replace woocommerce_template_loop_product_thumbnail with a different action name?

I cannot think of another reason why this would fail to remove the thumb.