> If the body of the request contains the form data then the problem is > on the server; if not, then the problem is on the browser. If the > problem is on the browser then more digging will be required, but if > it's on the server then the information about the whole request > (headers and body) will help the server-side developer work out what's > going on.
Using Charles, the body of the request DOES contain the form data. I will send the whole request (header and body) to the developer to hopefully find a solution. Thanks