Dropdown column value becomes empty after pressing Tab (double closeEditor call reads a closed widget)

Package / version: jspreadsheet-ce 5.0.4 (latest on npm at time of writing)

Steps to reproduce

1. Create a worksheet with a column of type: 'dropdown' (see minimal reproduction below).
2. Double-click the cell to open the dropdown editor.
3. Pick an option (or leave the currently highlighted/default option as-is).
4. Press Tab.

Minimal reproduction:

jspreadsheet(document.getElementById('spreadsheet'), {
  worksheets: [{
    data: [[1]],
    columns: [
      { type: 'dropdown', title: 'Status', source: [
        { id: 1, name: 'Open' },
        { id: 2, name: 'Closed' }
      ] }
    ]
  }]
});

Expected behavior

The selected value is committed to the cell, and focus moves to the next cell — standard Tab behavior.

Actual behavior

The cell value becomes empty.

Root cause (from reading the minified source, jspreadsheet.min.js)

• On Tab while a dropdown editor is open, keyDownControls does not call closeEditor directly. Instead it calls current.edition[0].children[0].blur().
• That blur() triggers the jSuites.dropdown widget's own close handling, which invokes the onclose callback registered in openEditor, roughly: onclose: function () { closeEditor.call(n, e, true); }.
• closeEditor(e, true) (commit=true) for a dropdown column reads the value with r = e.children[0].dropdown.close(true); — calling .close(true) on the widget a second time, while it's already mid-close from the blur that triggered this whole chain.
• This second .close(true) call reads from a widget instance whose internal state has already been torn down/reset by the first close, so it returns an empty value, which then gets written back to the cell.

Call chain summary:

blur()
  -> jSuites.dropdown widget's own close handling
    -> onclose callback -> closeEditor(e, true)
      -> e.children[0].dropdown.close(true)   // 2nd close call, widget already closing
        -> returns empty value -> written to cell

Related open issues (same symptom, no fix landed yet)

• #370 — "Dropdown Value Disappears After Tabbing Then Click"
• #1111 — "Open dropdown when down arrow is pressed and close when the tab key is pressed"

Workaround

Click another cell instead of pressing Tab after selecting a dropdown option.