phpmailer 给企业微信邮箱发送携带日程的邮件会自动创建日程？

1.普通创建会议

2.日程显示会议

（这一步都是正常的。下面开始不正常）

3.收到了携带日程格式的邮件（这是服务器通过phpmailer发送的日程邮件）
只要是收到的日程邮件。就会创建日程。还会给服务器回调推送。

（自动创建了一个邮件里面的日程。仅有1个标题。其余信息没有）

下面是我phpmailer发送邮件的代码（日程邮件部分代码）

//拼接邮件里面的日程内容
public static function getCalendar($uuid, $meeting, $method, $subject)
    {
        Carbon::setLocale('zh');
        $start = new Carbon($meeting->start);
        $end = new Carbon($meeting->end);
        $start_format = getIcalDate($start->unix());
        $end_format = getIcalDate($end->unix());

        $summary = $meeting->name;
        $dsc = $meeting->dsc;
        $msg = new \message\Metting($meeting);
        $location = $msg->getRoom();

        $now = getIcalDate(time());

        $str = "BEGIN:VCALENDAR" . "\n" .
            'PRODID:-//Microsoft Corporation//Outlook 11.0 MIMEDIR//EN' . "\n" .
            "VERSION:2.0" . "\n" .
            "METHOD:$method" . "\n" .
            "BEGIN:VEVENT" . "\n" .

            //设置时区
            'BEGIN:VTIMEZONE' . "\n" .
            'TZID:Asia/Shanghai' . "\n" .
            'BEGIN:STANDARD' . "\n" .
            'TZOFFSETFROM:+0800' . "\n" .
            'TZOFFSETTO:+0800' . "\n" .
            'END:STANDARD' . "\n" .
            'END:VTIMEZONE' . "\n" .

            "ORGANIZER:MAILTO:$subject" . "\n" .
            "UID:$uuid" . "\n" .
            "DTSTAMP:" . $now . "\n" .
            "DTSTART:$start_format" . "\n" .
            "DTEND:$end_format" . "\n" .
            "LOCATION:$location" . "\n" .
            "DESCRIPTION:$dsc" . "\n" .
            "SUMMARY:$summary" . "\n" .

            'X-MICROSOFT-CDO-IMPORTANCE:1' . "\n" .
            'CLASS:PUBLIC' . "\n" .

            "STATUS:TENTATIVE" . "\n" .
            "SEQUENCE:0" . "\n" .
            "RESOURCES:" . "\n" .
            "TRANSP:OPAQUE" . "\n" .

            'PRIORITY:5' . "\n" .
            'BEGIN:VALARM' . "\n" .
            'TRIGGER:-PT10M' . "\n" .
            'ACTION:DISPLAY' . "\n" .
            'DESCRIPTION:Reminder' . "\n" .
            'END:VALARM' . "\n" .
            'END:VEVENT' . "\n" .
            'END:VCALENDAR' . "\n";
        return $str;
    }