TextBlock resize drag icon is missing

While the TextBlock is in edit mode, it is usually the case that we find a drag resize icon to modify the size of the editor itself.
image

In my case, this icon is somehow missing.

            GraphObject.make(Panel, Panel.Table,
                /* Notes Text area*/
                GraphObject.make(TextBlock,
                    {
                        stretch: Panel.Fill,
                        name: "nodeNotesEditor",
                        margin: 4,
                        row: 2,
                        width: 60,
                        isMultiline: true,
                        editable: true,
                        wrap: TextBlock.None,
                        overflow: TextBlock.OverflowEllipsis,
                        background: "Probably some stuff under NDA, just a css class though"
                        stroke: "Probably some stuff under NDA, just a css class though"

                    },
                    new Binding("text", "",
                        "Probably some stuff under NDA"
                    ),
                    new Binding("Probably some stuff under NDA"),
                    new Binding("Probably some stuff under NDA").makeTwoWay(),
                    new Binding("Probably some stuff under NDA").makeTwoWay(),
                )
            ),

What could reasonably be the reason for the resize click and drag tool to be missing?

Here’s how my textBox looks at the moment

image

I tried your code as well as I could, but was unable to reproduce the problem that you report. Resizing of the text editor works well in both Firefox and Chrome.

  myDiagram.nodeTemplate =
    $(go.Node, "Auto",
      { resizable: true },
      $(go.Shape,
        { fill: "white" },
        new go.Binding("fill", "color")),
      $(go.Panel, go.Panel.Table,
        /* Notes Text area*/
        { stretch: go.GraphObject.Fill },  // I added this
        $(go.TextBlock,
            {
                stretch: go.Panel.Fill,
                name: "nodeNotesEditor",
                margin: 4,
                row: 2,
                //width: 60,  // I removed this so that the stretch will work
                isMultiline: true,
                editable: true,
                wrap: go.TextBlock.None,
                overflow: go.TextBlock.OverflowEllipsis,
                background: "whitesmoke",
                stroke: "black"
            },
            new go.Binding("text").makeTwoWay()
        )
      )
    );