Hi Rich,
Thanks for bringing this issue to our attention. I was able to see the issue and I have logged a bug report #1526. Please keep track of the
following link to check the status of the issue.
Defect #1526 - Bug in the edit functionality of TreeNodeAdv .
We will try our very best to fix this at the earliest. We appreciate your continued interest in Syncfusion Products.
Thanks,
Deepa.T.S