This is a bug found when attempting to connect to a backend running Hunchentoot (Clisp web server), and the CLisp web framework Lucerne.
Most other application servers I have experience with wouldn't mind, but this server expects to parse a request body when the Content Type is set. The Android http client, contrary to the iOS one, sets the content type not only on Post/Put/Patch as per the documentation, but actually on all http verbs.
The issue can be easily fixed by changing :
I could send a pull request if you want.