Body is not sent by API Connector

(My English is helped by Google Translate)

I am trying to POST to AWS Lambda through Amazon API Gateway (HTTP API) using an API connector.

But the body has not been sent. Although it is set as shown in the “Capture01” image, the body does not exist as in the “Capture02” image.

In the case of Curl command or ARC (Advanced REST client), the body exists as shown in the “Capture03” image.

(Capture02 and Capture03 is Amazon CloudWatch’s log)

Looking at the image, the “accept-encoding” is different. Is this the cause?