We are currently using some of your components and we are facing a lot of issues while using RadTreeView.
Most of them are related to drag/drop operations and the new position of the item in the new TreeView.
As you can see in the video that i attatched everything is working fine until the middle of the video after dragging 5 items to the new TreeView the drag template becomes unstable and blinks, after adding that one to the tree you are not able to keep dragging more items.
The only thing that we modifed is the item template and we are using the latest binaries of UI for WPF.
What we can do?
Here you can find the video