Unable to get the request and response from the Service call activity - request and response of external service are showing with empty body

We are trying to call the External service using Service Call Activity. We added the SOAP request and Response with the body content. After hitting the service endpoint through postman. It is calling the Service Call Activity, but the request and response of external service are showing with empty body like below

Request:
<?xml version="1.0" encoding="utf-8"?>
<env:Envelope xmlns:env="">schemas.xmlsoap.org/.../">
<env:Body />
</env:Envelope>

Response:
<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="">schemas.xmlsoap.org/.../">
<soapenv:Header />
<soapenv:Body>
<response />
</soapenv:Body>
</soapenv:Envelope>