ListView and TreeView items appear and disappear randomly when scrolling when they are Nodes

ListView/TreeView support putting nodes directly into the user interface (without any cell factory other than the default). The problem is that by doing so the VirtualFlow is forced to occassionally move the nodes from one cell to another, and in doing so actually sometimes to leave some cell nodes in an unparented state: resulting in them being invisible until the user scrolls a slight bit.