Shopifiy Calls our Webhook Several Times in different Time after One Order is Paid

I have set up a webhook for Order payment with AliPay payment.

Our customer finished his payment at 21:32 yesterday.

After that, shopify calls our webhook several times since it but payload are same.

The difference is “updated_at” in json according to the moment.

Here are the times

Date (GMT+8) Time
2023-11-06 21:32
2023-11-06 21:33
2023-11-06 21:35
2023-11-06 21:37
2023-11-06 21:42
2023-11-06 22:04
2023-11-06 22:35
2023-11-06 23:35
2023-11-07 01:35
2023-11-07 05:35
2023-11-07 09:35

Moreover, I ask Support Advisor and confirm that there is one webhook for it only.

Thank you