QTableVIew: inconsistent behaviour of resizeColumnsToContents() when called after resizeRowsToContents()

There is an inconsistency in the behavior of QTableView::resizeColumnsToContents().
Consider the following cases where the different results are displayed:

First case, doesn't resize the columns properly:

tableView->setModel(model);
tableView->resizeRowsToContents();
tableView->resizeColumnsToContents();
...

Second case, but this one does work well:
...
tableView->setModel(model);
tableView->resizeColumnsToContents();
tableView->resizeRowsToContents();