Fix Gravity Forms Captcha

functions.php

// This action should be inside add_actions

/**
 * Remove Gravityforms captcha action
 * This is a fix to prevent interferences from commonLib.js
 */
add_action('get_footer', function(){
    global $wp_filter;
    foreach($wp_filter['wp_footer']->callbacks as $priority => $hooks){
        foreach($hooks as $k => $hook){
            if(is_array($hook['function'])
                && count($hook['function']) == 2 && is_a($hook['function'][0], 'GF_Field_CAPTCHA')
                && $hook['function'][1] == 'ensure_recaptcha_js'){
                unset($wp_filter['wp_footer']->callbacks[$priority][$k]);
            }
        }
    }
    add_action('wp_footer', [$this, 'fix_gravityforms_recaptcha_js']);
});


/**
 * Re-add the same logic from gravityforms with an
 * additional check
 */
public function fix_gravityforms_recaptcha_js() {
    ?>
    <script type="text/javascript">
        var gfRecaptchaPoller = setInterval( function() {
            if( typeof renderRecaptcha === 'undefined' || ! window.grecaptcha || ! window.grecaptcha.render ) {
                return;
            }
            renderRecaptcha();
            clearInterval( gfRecaptchaPoller );
        }, 100 );
    </script>

    <?php
}

If this is NOT working for anyone, we had to delay action to wp_footer. On one machine the above worked perfectly. On another we had to use add_action('wp_footer', function () { .... }) in order to get this work.

Unfortunately I do not have an explanation as to why, but if that tip helps anyone, i'll be happy.