Nathan:
The buttons are working as expected. In your first screen shot, next to the preview, you have the 2D Symbol button selected, which is showing the 2D Symbol (as drawn). In your second screen shot, you have the 2D View button selected, which shows the result of the 2D Script, which is empty, so nothing is generated. If you would like to see the 2D Symbol in the 2D View, use the
Fragment2 command (FRAGMENT2 fragment_index, use_current_attributes_flag) in the 2D Script. In the Object Settings, the 2D Symbol will be displayed in the Plan preview, so the 2D Script is not required, these two different previews are for the GDL environment.
David