When setting the trackName or artistName properties of the Windows.Media.MediaControl object, a fatal error is thrown (causing your app to crash if not caught) when the string being assigned is greater than 128 characters. While it's unlikely that
track and artist names will be so long, this bug is not yet documented anywhere.
A fatal error is not the appropriate response here. The API should be able to handle long names without crashing. Either the name should be truncated with an ellipsis or the name should scroll horizontally.