[mailpoetsignup] -> Invalid HTML

[mailpoetsignup mailpoetsignup list:3 " Ja, ich m?chte den Newsletter abonnieren"]

generates invalid html markup. I posted the markup below, the falsy part start at <input type="hidden" name="fieldVal" value="3"

<div class="wp-block-contact-form-7-contact-form-selector"><div role="form" class="wpcf7" id="wpcf7-f370-p191-o1" lang="en-US" dir="ltr">
<div class="screen-reader-response"><p role="status" aria-live="polite" aria-atomic="true"></p> <ul></ul></div>
<form action="/kontakt/#wpcf7-f370-p191-o1" method="post" class="wpcf7-form init wpcf7-acceptance-as-validation" novalidate="novalidate" data-status="init">
<div style="display: none;">
<input type="hidden" name="_wpcf7" value="370" />
<input type="hidden" name="_wpcf7_version" value="5.4.1" />
<input type="hidden" name="_wpcf7_locale" value="en_US" />
<input type="hidden" name="_wpcf7_unit_tag" value="wpcf7-f370-p191-o1" />
<input type="hidden" name="_wpcf7_container_post" value="191" />
<input type="hidden" name="_wpcf7_posted_data_hash" value="" />
<input type="hidden" name="_wpcf7cf_hidden_group_fields" value="" />
<input type="hidden" name="_wpcf7cf_hidden_groups" value="" />
<input type="hidden" name="_wpcf7cf_visible_groups" value="" />
<input type="hidden" name="_wpcf7cf_repeaters" value="[]" />
<input type="hidden" name="_wpcf7cf_steps" value="{}" />
<input type="hidden" name="_wpcf7cf_options" value="{&quot;form_id&quot;:370,&quot;conditions&quot;:[],&quot;settings&quot;:{&quot;animation&quot;:&quot;yes&quot;,&quot;animation_intime&quot;:200,&quot;animation_outtime&quot;:200,&quot;conditions_ui&quot;:&quot;normal&quot;,&quot;notice_dismissed&quot;:false}}" />
</div>
<p>

                            <span class="wpcf7-form-control-wrap mailpoetsignup">
            <span class="wpcf7-form-control wpcf7-mailpoetsignup">
                <label class="wpcf7-list-label">
                <input type="checkbox"
                       name="mailpoetsignup[]" value="Newsletter-Mailing-Liste"
                       id="mailpoetsignup"
				                />&nbsp;Ja, ich m?chte den Newsletter abonnieren                    <input type="hidden" name="fieldVal"  value="3"
                </label>
                <br/>
                </span>

                </span>

            </p>
<div class="wpcf7-response-output" aria-hidden="true"></div></form></div></div>