chunked MUST be the last transfer-coding applied to the message-body

[#1]

I have a simple request with 2 headers and GET call with path parameter. It's failing even before sending a request to the backend server.

{ "fault": { "faultstring": "chunked MUST be the last transfer-coding applied to the message-body", "detail": { "errorcode": "protocol.http.ChunkedShouldBeLast" } } }

Anyone knows about this error?

trace-errro.jpg