I've attempted a variety of things to fix this, including a custom xaml checkbox control, all to no avail. The default text style selected for the Checkbox is white, the custom xaml control has foreground="White". Nothing seems to impact the checkbox content
Here is an image of the dialog in the editor window (note the default text style):

Here is that same dialog when the installer is actually running:

How is this not as simple as updating the text style? I must be missing something.