Callbacks to IBranchLinkShareInterface are never called

[yonkahlon]

After running GetShortURL(), the ReceivedUrl callback method is successfully called (part of IBranchUrlInterface):

Branch.GetInstance().GetShortURL(this, _branchObj, _linkProperties);

When I call ShareLink() in the ReceivedUrl callback, none of the IBranchLinkShareInterface methods are called to let me know what the user did.

Branch.GetInstance().ShareLink(this, _branchObj, _linkProperties, "[My message text]");

If you go to the Branch-Xamarin-SDK.iOS project, and look at BranchIOS.cs, there is this code:

public override void ShareLink (IBranchLinkShareInterface callback,
			BranchUniversalObject universalObject,
			BranchLinkProperties linkProperties,
			string message)
{
	IOSNativeBranch.BranchUniversalObject buo = BranchIOSUtils.ToNativeUniversalObject (universalObject);
	IOSNativeBranch.BranchLinkProperties blp = BranchIOSUtils.ToNativeLinkProperties (linkProperties);
	UIKit.UIWindow window = UIKit.UIApplication.SharedApplication.KeyWindow;
	buo.ShowShareSheetWithLinkProperties (blp, message, window.RootViewController, delegate(string url, bool isShared) { });
}

Nothing is being done when buo.ShowShareSheetWithLinkProperties is complete (you can see there is just an empty delegate. An IBranchLinkShareInterface object is passed to this method, so I wonder if it should be used in the completion delegate?