WD datasets: last open directory is not saved

1) Open WD.
2) Add "Read Sequence" element on the scene.
3) Click the element.
=> Bottom datasets panel appears.
4) Click "Add file" button.
=> The file dialog appears with some directory A.
5) Choose some file from some directory B (A != B) and click "Open".
6) Click "Add file" button again.
Actual: The file dialog opens with the directory A.
Expected: The file dialog opens with the directory B.