When using PlayFabHTTP from an editor script (i.e. uploading TitleData through an editor window) the Coroutine MakeRequestViaUnity in PlayFabHTTP.cs always "pauses" at yield return www;
Once you start dragging the editor window around, it will "unpause" and the InvokeCallback will finally be fired.
This is a known problem when using Coroutines/WWW inside the editor.
In our case this was easy to fix, as we are using UniRx and can therefor use its main thread dispatcher, which will work just fine in the editor.
So instead of calling
instance.StartCoroutine(instance.MakeRequestViaUnity(requestContainer));
in PlayFabHTTP.cs we use
MainThreadDispatcher.StartCoroutine(instance.MakeRequestViaUnity(requestContainer));
UniRx can be downloaded here
https://github.com/neuecc/UniRx
If you don't want to use UniRx, here are two other solutions:
An out of the box solution (which will freeze the editor while the coroutine is running) is described here
https://chicounity3d.wordpress.com/2014/02/12/coroutines-in-the-editor/
Also, there is a plugin on the asset store which lets you use coroutines in the editor (not tested)
https://www.assetstore.unity3d.com/en/#!/content/27373
While this is not a major bug (dragging around a window is ok as a workaround) i hope this helps others with the same problem ;)
