Edit trigger not working on repeated selection of a cell in QTableView

I am developing software for use with a touch screen, so on all QTableViews where I want the user to edit contents in cells I set the editTriggers of the table to QAbstractItemView::AllEditTriggers so that a single click starts the editing (double clicks are quite difficult to do on a touchscreen).

Faulty behaviour:
When I click a cell the editor shows.
Then I click into the table in the space with no cells and the editor closes.
Now if I click on the previously selected cell again the editor does not show up.
A double click is needed to make the editor appear.

I attached the Qt chart example with the only modification of
table->setEditTriggers(QAbstractItemView::AllEditTriggers);
in mainwindow.cpp:103