Thank you for writing.
I managed to reproduce the issue and I have logged it in our Public Issue Tracking System
. Feel free to add your vote / subscribe for status updates here: http://www.telerik.com/support/pits.aspx#/public/winforms/14300
In the meantime, please use the NodeAdded/ing events of RadTreeView instead.
Your Telerik Points
have been updated for this report.
I hope that you find this information useful. Let us know if you need anything else.
the Telerik team