我添加了一些自定义表单字段using comment_for() 以及过滤comment_form_default_fields 和comment_form_defaults 钩子用于使用自定义注释字段以及作者、电子邮件和url。修改工作与用户注销时一样好，但如果登录自定义表单字段，则会消失，只留下提交按钮。我的修改/筛选是否有任何原因导致这种行为？

function.php

/** 
 * CUSTOM COMMENT FORM
 * @method magneton_comment_form
 * Replaces default markup for the WordPress comment form.
 */
function magneton_comment_form_fields( $fields ) {
    //$commenter      = wp_get_current_commenter();
    //$user           = wp_get_current_user();
    //$user_identity  = $user->exists() ? $user->display_name : \'\';
    $req            = get_option( \'require_name_email\' );
    $aria_req       = ( $req ? \' aria-required="true"\' : \'\' );

    $fields = array(

        \'author\'        => \'<div class="form-group form-inline">
                            <label for="comment-author" class="sr-only">\' . __( \'Author\', \'magneton\' ) . \'</label>
                            <input type="text" name="author" id="comment-author" class="form-control author-field" placeholder="\' . __( \'Author (required)\', \'magneton\' ) . \'"\' . $aria_req . \'>\',
        \'email\'         => \'<label for="comment-author-email" class="sr-only">\' . __( \'E-Mail\', \'magneton\' ) . \'</label>
                            <input type="email" name="email" id="comment-author-email" class="form-control email-field" placeholder="\' . __( \'E-Mail (required)\', \'magneton\' ) . \'"\' . $aria_req . \'>\',
        \'url\'           => \'<label for="comment-author-url" class="sr-only">\' . __( \'Website\', \'magneton\' ) . \'</label>
                            <input type="url" name="url" id="comment-author-url" class="form-control url-field" placeholder="\' . __( \'Website\', \'magneton\' ) . \'">
                            </div>\',
        \'comment_field\' => \'<textarea name="comment" id="comment" class="form-control comment-field"  aria-required="true" rows="10"></textarea>\'
    );

    return $fields;    

}
add_filter( \'comment_form_default_fields\', \'magneton_comment_form_fields\' );

/** 
 * REPLACE ORIGINAL COMMENT FORM
 * @method magneton_comment_form
 * Replaces default markup for the WordPress comment form.
 */
function magneton_comment_form_defaults( $defaults ) {

    if ( isset( $defaults[ \'comment_field\' ] ) ) {
        $defaults[ \'comment_field\' ] = \'\';
    }

    return $defaults;

}
add_filter( \'comment_form_defaults\', \'magneton_comment_form_defaults\' ); 

comment.php

$comments_args = array(                
                \'id_form\'       => \'comment-form\',
                \'class_form\'    => \'comment-form\',
                \'class_submit\'  => \'btn btn-default\',
                \'title_reply\' => __( \'Leave a reply\', \'magneton\' ),                
                \'label_submit\' => __( \'Submit Comment\', \'magneton\' )
            );