获取解密数据出现错误 java.lang.IllegalArgumentException: Last unit does not have enough valid bits，后续该笔支付微信重试回调直接成功了，想问下这个错误的具体产生原因是什么，如何避免这个错误？

验证签名&解密数据 的方法如下：

com.wechat.pay.contrib.apache.httpclient.notification.NotificationHandler#parse

public String verify(String wechatPaySerial, String nonce, String timestamp, String signature, String body) {
    NotificationRequest request = new NotificationRequest.Builder()
            .withSerialNumber(wechatPaySerial)
            .withNonce(nonce)
            .withTimestamp(timestamp)
            .withSignature(signature)
            .withBody(body)
            .build();
    // 验签和解析请求体
    Notification notification = null;
    try {
        notification = handler.parse(request);
    } catch (ValidationException e) {
        log.error("微信验证签名失败", e);
    } catch (ParseException e) {
        log.error("解析微信结果失败", e);
    }
    return notification == null ? null : notification.getDecryptData();
}