I ran into the same problem and with the help of Findley on team M, we were able to resolve this. The problem is with the bindings in IIS for the website/app.
You must have the HTTP or HTTPS binding as the first binding above the other defaults (net.tcp, net.pipe, etc). You can simply remove them and re-add them in the right order (take a screen shot before hand so you an put in the other bindings 🙂 ). Alternatively, if you know what you're doing, you can also edit the %WINDIR%\System32\inetsrv\config\applicationHost.config file. Just make a backup first!
I tested this with HTTP & HTTPS bindings as well as just HTTPS and it worked for me. I did not need to reset IIS.
Thanks,
Paul
