setCurrentIndex() doesn't display cursor(bounding rect)

[DIMEDROLL]

I sublcass QTreeView and QStandartItemModel to display some data. The data is displayed as a list with two columns in QTreeView.
QTreeView has such properties in constructor:

// set TreeView properties
	 setRootIsDecorated(false);
	 setSelectionBehavior(QAbstractItemView::SelectRows);
	 setSelectionMode(QAbstractItemView::NoSelection);
 
	 setEditTriggers(NoEditTriggers);
	 setAllColumnsShowFocus(true);
	 setSortingEnabled(true);
 
	 // set header properties
	 header()->setStretchLastSection(true);
	 header()->setSortIndicator(0, Qt::AscendingOrder);
	 header()->setSortIndicatorShown(true);
	 header()->setClickable(true);

// set TreeView properties
	 setRootIsDecorated(false);
	 setSelectionBehavior(QAbstractItemView::SelectRows);
	 setSelectionMode(QAbstractItemView::NoSelection);

	 setEditTriggers(NoEditTriggers);
	 setAllColumnsShowFocus(true);
	 setSortingEnabled(true);

	 // set header properties
	 header()->setStretchLastSection(true);
	 header()->setSortIndicator(0, Qt::AscendingOrder);
	 header()->setSortIndicatorShown(true);
	 header()->setClickable(true);

To copy to clipboard, switch view to plain text mode 

The problem rises when the model updates itself end after that I try to set a current item programmatically. I use setCurrentIndex() to set it. setCurrentIndex() works fine but it doesn't show the focus/cursor (look at attachment picture to understand what I mean). It is the rect around current item.
I pass a QPersistentModelIndex to setCurrentIndex() and check it.
I've debugged setCurrentIndex(). QTreeView::visualRect() fails to set d->pressedPosition because of invalid index. But how can this be possible, the index is checked and is valid?
Do anybody know how to fix that?