TableView, TreeTableView : getSelectedCells contains incorrect info.

TableView, multiple-selection mode.

Using shift+click select rows on indices 0, 1, 2.
Using shift+click deselect them in reverse order, so that only row 0 is selected. Print out getSelectedCells.

I see :
[TablePosition [ row: 0, column: javafx.scene.control.TableColumn@3a9d3aa3, tableView: TableView@1751991c[styleClass=table-view] ], TablePosition [ row: 0, column: null, tableView: TableView@1751991c[styleClass=table-view] ]]

Obviously, information dublication.

But, further it affects badly : one of them will be removed on some key combination later, but another one will stay alive until something clear it away, that results in incorrect info about selection.