Thank you for bringing this issue to our attention. I logged it in our issue tracking system and it will be addressed in one of our upcoming releases. I updated also your Telerik points accordingly. You can track the issue status by following this link
You can work around the issue by surrounding the code which adds nodes with calls to BeginUpdate
methods. Here is a sample:
I hope it helps. If you still experience the issue, please send us your application and we will try to find a proper solution.
the Telerik team