iOS - Local webview shows black background when page is dragged

I'm currently working with some WebViews right now, one of which includes loading a local HTML file into my app. On iOS, if I try dragging the page, a black background shows. What can I do to disable page scrolling (since the content should fit on the page) or render the border white instead?

Here is what is happening using the forms WebView demo:

Image may be NSFW.
Clik here to view.