Did anyone find a solution or did the bug get fixed? I'm getting Fullscreen request failed: [object Event] in visual studios.
Just stick this code at the top of your C2Runtime.js file in visual studios.
var activation = Windows.ApplicationModel.Activation;
var ViewManagement = Windows.UI.ViewManagement;
var ApplicationViewWindowingMode = ViewManagement.ApplicationViewWindowingMode;
var ApplicationView = ViewManagement.ApplicationView;
ApplicationView.preferredLaunchWindowingMode = ApplicationViewWindowingMode.fullScreen;"
That should launch it fullscreen