微信支付回调验签，使用的wechatpay-java 0.2.12，但是偶尔会出现报错：Caused by: com.wechat.pay.java.core.exception.ValidationException: Processing WechatPay notification,signature verification failed,signType[WECHATPAY2-SHA256-RSA2048] serial[659A3E7D0B61A6B2D97E9FEE05C68E4FC13A0B04] message[1729512147

6K9cI3QxLNdZ

controller代码：
@PostMapping("payCallback")
public ResponseEntity<Void> payCallback(
        @RequestBody String body,
        @RequestHeader("Wechatpay-Serial") String wechatpaySerial,
        @RequestHeader("Wechatpay-Signature") String wechatpaySignature,
        @RequestHeader("Wechatpay-Timestamp") String wechatpayTimestamp,
        @RequestHeader("Wechatpay-Nonce") String wechatpayNonce
) {
    WechatVerificationIBO ibo = new WechatVerificationIBO();
    ibo.setWechatSignature(wechatpaySignature);
    ibo.setWechatTimestamp(wechatpayTimestamp);
    ibo.setWechatpayNonce(wechatpayNonce);
    ibo.setWechatPaySerial(wechatpaySerial);
    ibo.setRequestBody(body);
    return wechatPayService.handlePayCallback(ibo);
}

调用api部分代码：
// 初始化 NotificationParser
NotificationParser parser = new NotificationParser((NotificationConfig) config);

// 构造 RequestParam
RequestParam requestParam = new RequestParam.Builder()
        .serialNumber(wechatVerificationIBO.getWechatPaySerial())
        .nonce(wechatVerificationIBO.getWechatpayNonce())
        .signature(wechatVerificationIBO.getWechatSignature())
        .timestamp(wechatVerificationIBO.getWechatTimestamp())
        .body(wechatVerificationIBO.getRequestBody())
        .build();

    // 以支付通知回调为例，验签、解密并转换成 Transaction
          Transaction transaction = parser.parse(requestParam, Transaction.class);
          wechatVerificationOBO.setTransaction(transaction);