Hi Ryan,
Sorry for the delay in getting back to you.
The below is the sample link which embeds an asp.net panel in the Groupbar control.
http://websamples.syncfusion.com/samples/Tools.Web/4.4.0.51/F58661/main.htmThe panel consists of 3 button controls. On selecting a button, the label control gets updated and at the same time the rootpanel resides expanded.
I am afraid that I couldn't reproduce the issue that the rootpanel collapses when the child items in the subpanel are selected.
Could you please let us know the version of 'Essential Studio' you are using, so that I might be helpful for us to reproduce the issue.
Thanks for using Syncfusion products.
Regards,
Valli