Request Content-Type Header is Overridden

[xsoufiane]

I believe there is an issue that results in overriding the headers before they get shipped. In particular, I have a request with a header "Content-Type" -> "application/x-www-form-urlencoded" but at the platfom level I receive "Content-Type" -> "application/json" :(

[agourlay]

Thank you for report, I have found the issue.
I will try to come up with a fix a publish a release soon.