问题表现为：原方法缺少对自己和两个用户互为上下级的拦截

修复方案：

找到文件app/services/user/UserServices.php

将方法spread整个代码替换为

/**
  * 静默绑定推广人
  * @param Request $request
  * @return mixed
*/
public function spread(int $uid, int $spreadUid, $code)
    {
        if ($uid == $spreadUid){
            return true;
        }
        $userInfo = $this->getUserInfo($uid);
        if (!$userInfo) {
            throw new ValidateException('数据不存在');
        }
        if ($code && !$spreadUid) {
            /** @var QrcodeServices $qrCode */
            $qrCode = app()->make(QrcodeServices::class);
            if ($info = $qrCode->getOne(['id' => $code, 'status' => 1])) {
                $spreadUid = $info['third_id'];
            }
        }
        //记录好友关系
        if ($spreadUid && $uid && $spreadUid != $uid) {
            /** @var UserFriendsServices $serviceFriend */
            $serviceFriend = app()->make(UserFriendsServices::class);
            $serviceFriend->saveFriend($uid, $spreadUid);
        }
        $data = [];
        //永久绑定
        $store_brokergae_binding_status = sys_config('store_brokerage_binding_status', 1);
        if ($userInfo->spread_uid && $store_brokergae_binding_status == 1) {
            return true;
        } else {
            //绑定分销关系 = 所有用户
            if (sys_config('brokerage_bindind', 1) == 1) {
                //分销绑定类型为时间段且过期 ｜｜临时
                $store_brokerage_binding_time = sys_config('store_brokerage_binding_time', 30);
                if (!$userInfo['spread_uid'] || $store_brokergae_binding_status == 3 || ($store_brokergae_binding_status == 2 && ($userInfo['spread_time'] + $store_brokerage_binding_time * 24 * 3600) < time())) {
                    if ($spreadUid && ($userInfo['uid'] == $spreadUid || $userInfo->uid == $this->dao->value(['uid' => $spreadUid], 'spread_uid'))) {
                        $spreadUid = 0;
                    }
                    if ($spreadUid && $this->dao->get((int)$spreadUid)) {
                        $data['spread_uid'] = $spreadUid;
                        $data['spread_time'] = time();
                    }
                }
            }
        }
        if ($data && !$this->dao->update($userInfo['uid'], $data, 'uid')) {
            throw new ValidateException('绑定失败');
        }
        if (isset($data['spread_uid']) && $data['spread_uid']) {
            /** @var UserBillServices $userBill */
            $userBill = app()->make(UserBillServices::class);
            //邀请新用户增加经验
            $userBill->inviteUserIncExp((int)$spreadUid);
        }
        return true;
    }

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