Express Multipart (Body Parser) - { [Error: unknown transfer-encoding] status: 400 }

I am getting the error { [Error: unknown transfer-encoding] status: 400 } from the express 3 module multipart. It sounds like the TE header should be getting sent - which it isn't. However, I have read that this header is incompatible with the content-length header, which is getting sent.

The following headers are getting sent:

{
    connection: 'keep-alive',
    'content-type': 'multipart/form-data; boundary=--------092114122750368',
    'content-length': '6983',
    host: '******* ',
    accept: 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'accept-encoding': 'identity',
    'user-agent': 'Mozilla/3.0 (compatible; Indy Library)'
}

Any thoughts on what might be causing this issue?

edit1

server code is given below:

var port = 80,
    express = require('express'),
    app;

app = express();

// support JSON, urlencoded, and multipart requests
app.use(express.json({
    limit: '50mb'
}));

app.use(express.urlencoded({
    limit: '50mb'
}));

app.use(express.multipart({
    uploadDir:'./uploads',
    limit: '50mb'
}));

app.use(function (err, req, res, next) {
    console.log(req.headers);
    console.log(err);
});

There is obviously more code, but this is where the error actually occurs. The output of req.header is what I supplied above as JSON and the output of { [Error: unknown transfer-encoding] status: 400 } was in the first line of this post. I originally added error callbacks after each app.use call but I found that it was express.multipart that was causing the issue.