This is a bug since ArchiCAD 9. The placed interactive schedule does not show any Text of the 2D-symbol.
I recently wrote a letter to Graphisoft, telling them this problem again.
Now I made a workaround with numbers which I build as filling.
Fills are shown in the interactive schedule. But If you need the complete alphabeth, its much work.
Jochen Suehlo . AC12-27 . MAC OSX 14.4 . WIN11
GDL object creation:
b-prisma.de