isLayoutPositioned: false not working when initial loc of nodes is null

GoJS
1

I need to achieve custom position of nodes and im turning off the property isLayoutPositioned. my issue is that when i create a new graph my backend returns all predefined nodes with loc: null so in the first load of the graph if the isLayoutPosisition is false my graph is not appearing. is there any way to achieve isLayoutPositions: false with loc values to be null?

here is my nodeTemplate:

$(go.Node,
     'Vertical',
     {
       deletable: this.allowEdit,
       isLayoutPositioned: false,
       toSpot: go.Spot.Left,
       cursor: 'pointer',
       selectionObjectName: 'SHAPE',
       },
      new go.Binding('location', 'loc').makeTwoWay(),
     $(
       go.Panel,
       'Auto', {
         name: 'SHAPE',
         portId: '',
         alignment: go.Spot.Center,
         alignmentFocus: go.Spot.Bottom,
         fromLinkable: true,
         fromLinkableSelfNode: this.allowEdit,
         fromLinkableDuplicates: this.allowEdit,
         toLinkable: true,
         toLinkableSelfNode: false,
         toLinkableDuplicates: false,
         toSpot: go.Spot.AllSides,
         fromSpot: go.Spot.AllSides
       },
       $(go.Picture,
         {
           desiredSize: new go.Size(50, 50),
           margin: new go.Margin(6, 8, 6, 10)
         },
         new go.Binding('source', 'assetType', (key) => {
           return 'assets/designer-images/' + key + '.png';
         })
       ),
     ),
     $(go.Panel, 'Auto', {},
       $(
         go.TextBlock,
         {
           name: 'SHAPE',
           editable: this.allowEdit,
           font: 'bold 13px sans-serif',
           opacity: 0.75,
           stroke: '#404040',
         },
         new go.Binding('text', 'label').makeTwoWay()
       )
     )
   );
 }
2

If I were you, I would implement an “InitialLayoutCompleted” DiagramEvent listener to check to see if there are any nodes where node.location.isReal() is false. If it is the case, I would call Diagram.layoutDiagram with a true argument.

$(go.Diagram, . . .,
  {
    "InitialLayoutCompleted": e => {
      if (e.diagram.nodes.any(n => !n.location.isReal()) e.diagram.layoutDiagram(true);
    }
  })