Tabulator documentation tells us that

The tabEndNewRow option will cause the table to create a new 
row and add focus on the first editable cell in that row when
you tab out of the last editable cell on the table. You can 
set it to one of a number of options to determine the data of 
the new row.

but in my code the tab pressed on last cell if it is editable it DELETEs the cell's value

    var cols = [{
        title: "Cell 1",
        field: "c1",
        editor: "input"
      },
      {
        title: "Cell 2",
        field: "c2",
        editor: "input"
      },
      {
        title: "Cell 3",
        field: "c3",
        editor: "input"
      },

    ];

    var row = {
      "c1": "",
      "c2": ""
    }
    var table = new Tabulator('#table', {
      columns: cols,
      data: [row],
      height: "100%",
      tabEndNewRow: row,
    })

Working jsFiddle https://jsfiddle.net/radek/xe4qbL5k/6/

would you have any solution for that issue?