Crash when recreating NodeEditor widget with the same controller

[ipr-fredrik2]

I have a page in my application that builds a NodeEditor, but I retain the controller for it in a global state.

If I rebuild the NodeEditor (the second time) with the previously used controller (that has a bunch of nodes and connections), I get a crash in render_info.dart:16:

/// get the position of object in the screen, correcting by the position of
/// vertical and horizontal scroll
Offset getObjectPosition(NodeEditorController controller, GlobalKey key) {
  var obj = key.currentContext?.findRenderObject();
  final RenderBox stackRenderBox = obj as RenderBox; /// <-- obj IS NULL HERE!

  // fix position by scroll position
  return stackRenderBox.localToGlobal(Offset.zero) -
      controller.stackPos! +
      Offset(controller.horizontalScrollController.offset,
          controller.verticalScrollController.offset);
}

Seems like its due to the global key being recreated when the pins are being recreated (in _InPortWidgetState, when you call controller.addInPort).

Is this a bug, or am I using the library wrong? It works phenomenally otherwise, thank you for creating another fantastic flutter package!