Hi, we encountered the following problem in our apllication: If we move items around and then back to the position where it was before in the XamDataTree, we get an exception ("Failure comparing two elements in the array"). We use "normal" Drag & Drop for some reasons instead of using the built-in mechanism. The built-in mechanism does not produce the error. But moving the items programmatically without Drag & Drop also leads to the error.
We use the MVVM pattern - moving is done completely on the viewmodels and not on the tree. I've added a small example illustrating the error. Unfortunately the above mentioned exeption does not occur - but at least you can see in the tree, that there is something wrong. After you've started the program, press the button
in the lower left corner that the example data will be created. The tree will show a top item ("Top") with 2 children. One has a "grandchild". Now drag the grandchild from one child to the other. Let it drop and then drag ist back to the first child. You will notice that the node suddenly appears to be empty but present. We use version 2016.2. I did also find no workaround for this problem. Any help will be appreciated.
Thanks in advance,
Sebastian