The problem we're running into is the HTML5 in the mediabox (we're using mediabox 200) isn't able to render two charts on the screen at once. This only occurs when in the device, using any regular browser - even older IE browsers work fine, but not from the device - only one chart prints.
As a test I pointed the HTML5 component to the frontpage of highcharts.com and instead of the charts there it's simply a blank area.