QTreeView::scrollTo does not work correctly

I have QTreeView with QFileSystemModel and button that do scrolling to user home directory (QDir::homePath()).
I need to show user home directory at the center when button pressed.
When I run my application and press the button the tree expands but item is not at the center. If I press the
button again item shows at the center.
But if I run my application, expands item, then collapse it and then press the button, then item will shows at center.
Expected when I press the button first time item shows at the center.
Test project attached.