Hi Mike,
Thanks for using Syncfusion Essential Diagram.
I have tested this behavior(adding two labels of different styles in a polygon node) in the Diagram Builder sample( v5.1.0.51 version) at runtime. And it is working as expected. Please see the image below.
http://websamples.syncfusion.com/samples/Diagram.Windows/F60995- Image/main.htm
I have also tried with programmatic creation and attached the sample. Please download the sample from the following link -
http://websamples.syncfusion.com/samples/Diagram.Windows/F60995/main.htmPlease refer the sample's CreateCustomPolygon() method that shows the adding of labels into the polygon programmatically. And let me know if you still has any problem with this.
Thanks,
Meera.