Windows: FileDialog of QtQuick.Dialogs 1 prevents rename of parent directory indefinitely

STR:
1. qmlscene file-dialog-dir-handle.qml
2. click "Open Dialogs' FileDialog"
3. select file in grandchild directory (e.g. "foo/bar/baz.txt")
4. try to rename the top directory in explorer (e.g. "foo" -> "foo_")

Explorer complains that the folder is in use.
"The action can't be completed because the folder or a file in it is open in another program"

Destroying the FileDialog instance doesn't help.

Apparently, Qt.labs.platform's FileDialog does not have this problem.

I suspect that pure QML DefaultFileDialog instantiates FolderListModel even when
native file dialog is in use, and it keeps directory handle for long? But it's just a guess.