Multiple selection with 1 element mandatory

<strong>Expected</strong>
Multiple selection with 1 element mandatory

<strong>Actual</strong>
First element must be selected

<strong>Screenshot</strong>
https://www.ysolutions.be/test/vos-defis-majeurs/

<strong>Stept to repeat</strong>
Fill the formulary without selection of the first checkbox -> the submission is refused.

If you select the first checkbox on each question -> it works.

I inspect the HTML and I see these these attribute on the first checkbox (not on the others) :

required=\\\"required\\\"
aria-required=\\\"true\\\"

<strong>Technical details</strong>

<code>Browser</code> Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36

<code>PHP version</code> 7.3.27

<code>PHP extensions</code> bcmath, bz2, calendar, Core, ctype, curl, date, dba, dom, enchant, exif, fileinfo, filter, ftp, gd, gettext, gmp, hash, iconv, imap, intl, ionCube Loader, json, ldap, libxml, litespeed, mbstring, mcrypt, mysqli, mysqlnd, odbc, openssl, pcntl, pcre, PDO, pdo_mysql, PDO_ODBC, pdo_pgsql, pdo_sqlite, pgsql, Phar, posix, pspell, readline, Reflection, session, shmop, SimpleXML, snmp, soap, sockets, SourceGuardian, SPL, sqlite3, standard, sysvmsg, sysvsem, sysvshm, tidy, tokenizer, wddx, xml, xmlreader, xmlrpc, xmlwriter, xsl, zip, zlib

<code>PHP settings</code> <ul><li>disable_functions: show_source</li>
<li>error_log: /dev/null</li>
<li>error_reporting: 4983</li>
<li>max_execution_time: 360</li>
<li>max_input_time: 360</li>
<li>max_input_vars: 200000</li>
<li>memory_limit: 1G</li></ul>

<code>MySQL client version</code> mysqlnd 5.0.12-dev - 20150407 - $Id: 7cc7cc96e675f6d72e5cf0f267f48e167c2abb23 $

<code>MySQL server version</code> 10.3.29-MariaDB

<code>MySQL engines</code> <ul><li>YES: MRG_MyISAM, CSV, MEMORY, Aria, InnoDB, PERFORMANCE_SCHEMA, SEQUENCE</li>
<li>DEFAULT: MyISAM</li></ul>

<code>MySQL table status</code> <ul><li>MyISAM@10, utf8mb4_unicode_ci, Dynamic<ul><li>wp_commentmeta: 0 rows</li>
<li>wp_comments: 1 rows</li>
<li>wp_links: 0 rows</li>
<li>wp_mlw_question_terms: 0 rows</li>
<li>wp_mlw_quiz_theme_settings: 0 rows</li>
<li>wp_mlw_themes: 0 rows</li>
<li>wp_options: 195 rows</li>
<li>wp_postmeta: 955 rows</li>
<li>wp_posts: 85 rows</li>
<li>wp_term_taxonomy: 43 rows</li>
<li>wp_termmeta: 14 rows</li>
<li>wp_terms: 43 rows</li>
<li>wp_usermeta: 25 rows</li>
<li>wp_users: 1 rows</li></ul></li>
<li>MyISAM@10, utf8_general_ci, Dynamic<ul><li>wp_mlw_qm_audit_trail: 1 rows</li>
<li>wp_mlw_questions: 3 rows</li>
<li>wp_mlw_quizzes: 1 rows</li>
<li>wp_mlw_results: 0 rows</li>
<li>wp_t_schema_migrations: 36 rows</li></ul></li>
<li>MyISAM@10, utf8mb4_general_ci, Dynamic<ul><li>wp_t_answers: 149 rows</li>
<li>wp_t_computed_variables: 0 rows</li>
<li>wp_t_field_values: 0 rows</li>
<li>wp_t_fields: 0 rows</li>
<li>wp_t_formulas: 10 rows</li>
<li>wp_t_passings: 3 rows</li>
<li>wp_t_questions: 64 rows</li>
<li>wp_t_sections: 0 rows</li></ul></li>
<li>MyISAM@10, utf8mb4_general_ci, Fixed<ul><li>wp_t_passing_answers: 42 rows</li>
<li>wp_t_scores: 139 rows</li></ul></li>
<li>MyISAM@10, latin1_swedish_ci, Dynamic<ul><li>wp_tcb_api_error_log: 0 rows</li>
<li>wp_td_fields: 16 rows</li>
<li>wp_td_groups: 3 rows</li></ul></li>
<li>MyISAM@10, utf8mb4_unicode_ci, Fixed<ul><li>wp_term_relationships: 60 rows</li></ul></li></ul>

<code>WordPress version</code> 5.8.1

<code>Plugins</code> <ul><li>Akismet Anti-Spam: 4.1.9</li>
<li>Hello Dolly: 1.7.2</li>
<li>Quiz And Survey Master: 7.3.4</li>
<li>Thrive Product Manager: 1.2.4</li>
<li>Wp-testing: 0.21.19</li></ul>

<code>Active theme stylesheet</code> thrive-theme

The page I need help with: [log in to see the link]