urlencode error for certain product attributes in url

Hello,

I changed the archive-product.php in my childtheme to contain a hardcoded product filter which gives users the option to filter products on product attributes. The filter works great untill i activate a product attributes archive page. Instead of displaying the filtered products it throws the following error.

Fatal error: Uncaught TypeError: urlencode(): Argument #1 ($string) must be of type string, array given in localhost/wp-includes/formatting.php:5590 Stack trace: #0 localhost/wp-includes/formatting.php(5590): urlencode() #1 localhost/wp-includes/class-wp-query.php(1170): wp_basename() #2 localhost/wp-includes/class-wp-query.php(940): WP_Query->parse_tax_query() #3 localhost/wp-includes/class-wp-query.php(1857): WP_Query->parse_query() #4 localhost/wp-includes/class-wp-query.php(3787): WP_Query->get_posts() #5 localhost/wp-includes/class-wp.php(663): WP_Query->query() #6 localhost/wp-includes/class-wp.php(783): WP->query_posts() #7 localhost/wp-includes/functions.php(1334): WP->main() #8 localhost/wp-blog-header.php(16): wp() #9 localhost/index.php(17): require('...') #10 {main} thrown in localhost/wp-includes/formatting.php on line 5590

This only happens when i try to filter on a product attribute which has the archive page enabled. After vardumping my taxonomies i found the only difference to be that “[“attribute_public”]=> int(1)” on product attributes with the archive page enabled, if the archive page is disabled it returns int(0).

The url that’s being generated after a filter has been applied is always something like this “shop/?pa_brand%5B%5D=nektar” and doesnt change depending on if the error is thrown or not. This is the code for my filter.

<form id="filter-form" method="get">
            <?php
            $taxonomies = wc_get_attribute_taxonomies();
            foreach ($taxonomies as $taxonomy):
                $attribute = "pa_" . $taxonomy->attribute_name;
                $terms = get_terms($attribute, ["hide_empty" => false]);
                if ($terms):
                    $product_attribute_terms = [];
                    $product_query = new WP_Query([
                        "post_type" => "product",
                        "post_status" => "publish",
                        "posts_per_page" => -1,
                    ]);
                    while ($product_query->have_posts()):
                        $product_query->the_post();
                        $product_attribute_terms = array_merge(
                            $product_attribute_terms,
                            wc_get_product_terms(get_the_ID(), $attribute, [
                                "fields" => "slugs",
                            ])
                        );
                    endwhile;
                    wp_reset_postdata();
                    foreach ($terms as $term):
                        if (in_array($term->slug, $product_attribute_terms)): ?>
                            <label>
                                <input type="checkbox" name="<?php echo esc_attr(
                                    $attribute
                                ); ?>[]" value="<?php echo esc_attr(
    $term->slug
); ?>" <?php if (
    isset($_GET[$attribute]) &&
    in_array($term->slug, $_GET[$attribute])
) {
    echo 'checked="checked"';
} ?>>
                                <?php echo esc_html($term->name); ?>
                            </label>
                            <br>
            <?php endif;
                    endforeach;
                endif;
            endforeach;
            ?>