Hello, 

I found a bug in XamDataTree, I am dragging a node from one tree to another one, and the first tree is inside a window that the user can resize. When the window size is smaller than the tree, the scroll bar appears and it auto scroll when the user drag the node.

The bug is the following :

If the user drag the node from the tree and the tree scrolls until the node disappear visually from the visible region, when the user is on the second tree, the drag stops to operate, if we come back with the node on the first tree, the drag also doesn't work.

It is a very major problem in my software since it is drag dependant.

Thank you to fix this problem as soon as possible.