Workspace.json issue in Lab 4.1?

I create the below workspace file, by creating two Launcher tabs side-by-side and clicking File -> Save Current Workspace As
However if I change the current workspace then reload that file the layout is not reset… I do not see the two Launcher windows side by side.
How can I specify a workspace.json file that sets the layout of the Launcher page?

{
  "data": {
    "layout-restorer:data": {
      "main": {
        "dock": {
          "type": "split-area",
          "orientation": "horizontal",
          "sizes": [
            0.5,
            0.5
          ],
          "children": [
            {
              "type": "tab-area",
              "currentIndex": 0,
              "widgets": []
            },
            {
              "type": "tab-area",
              "currentIndex": 0,
              "widgets": []
            }
          ]
        }
      },
      "down": {
        "size": 0,
        "widgets": []
      },
      "left": {
        "collapsed": false,
        "visible": true,
        "current": "filebrowser",
        "widgets": [
          "filebrowser",
          "running-sessions",
          "@jupyterlab/toc:plugin"
        ],
        "widgetStates": {
          "jp-running-sessions": {
            "sizes": [
              0.25,
              0.25,
              0.25,
              0.25
            ],
            "expansionStates": [
              false,
              false,
              false,
              false
            ]
          }
        }
      },
      "right": {
        "collapsed": true,
        "visible": true,
        "widgets": [
          "jp-property-inspector",
          "debugger-sidebar"
        ],
        "widgetStates": {
          "jp-debugger-sidebar": {
            "sizes": [
              0.2,
              0.2,
              0.2,
              0.2,
              0.2
            ],
            "expansionStates": [
              false,
              false,
              false,
              false,
              false
            ]
          }
        }
      },
      "relativeSizes": [
        0.21255664935076815,
        0.7874433506492319,
        0
      ],
      "top": {
        "simpleVisibility": true
      }
    },
    "file-browser-filebrowser:cwd": {
      "path": "~"
    },
    "workspace-ui:lastSave": "example1.jupyterlab-workspace"
  },
  "metadata": {
    "id": "example1",
    "last_modified": "2024-02-21T07:04:21+00:00",
    "created": "2024-02-21T07:04:21+00:00"
  }
}

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