jwt string in request body gets converted to json payload when scripting is enabled

Description

I'm working with an API that uses custom "Content-Type" header and the request body is a jwt string.
Whenever I enable Scripting, the jwt in the body gets converted to a json payload. My script does not even contain any logic that modifies the request.

async function onRequest(context, url, request) {
  return request;
}

Steps to Reproduce

1. Enable Scripting
2. run:

curl -X POST https://www.example.com -H "Content-Type: application/my-custom-type" --data-raw "eyJzdGF0dXMiOiJydW5uaW5nIiwiYWN0aW9ucyI6W3sidHlwZSI6InNldCIsIm91dHB1dCI6Imxpbmtfc291cmNlIiwidmFsdWUiOiJkZWZhdWx0IiwiZG9uZSI6dHJ1ZX1dfQ==" --proxy http://localhost:9090

Current Behavior

Payload is altered:

Expected Behavior

request body should remain as eyJzdGF0dXMiOiJydW5uaW5nIiwiYWN0aW9ucyI6W3sidHlwZSI6InNldCIsIm91dHB1dCI6Imxpbmtfc291cmNlIiwidmFsdWUiOiJkZWZhdWx0IiwiZG9uZSI6dHJ1ZX1dfQ==

Environment

• App version: e.g Proxyman 4.15.0
• macOS version: macOS Monterey