FileDialog's selectedFile is wrong when going up a directory

Steps to reproduce:

1. Run code below
2. Go into a directory
3. Click the "up" arrow or press Alt+Up

The expected behaviour is that the directory that you were previously in would be selected, but the actual behaviour is that a different directory is selected.

import QtQuick
import QtQuick.Controls
import QtQuick.Dialogs

ApplicationWindow {
    id: root
    width: 800
    height: 600
    visible: true

    FileDialog {
        visible: true
        currentFolder: "file:///tmp"
    }
}