There was a time when that used to work.
I think something has changed over time.
When you open your script and delete all of the 2D script, add the following command.
FRAGMENT2 1, 0
This will force it to show what is drawn in layer 1 of the 2D symbol.
There are actually 16 layers that you can draw in (just press CTRL+L when in the 2D symbol editor window and you will see the layer list).
With a little more GDL coding you cans actually create an object that can have up to 16 different 2D views - ideal for plants.
But then we start diving the depths of GDL coding.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10