FileDialog save mode unusable

Filename user enters can't be accessed

Steps:
1. Run the simple tester application.
2. In the file dialog write the name (e.g. "temp.txt") and press Save.

Expected output (works with Qt 6.2):
qml: selectedFile: file:///C:/Users/kgron/Projects/build-savedialogtester-Desktop_Qt_6_2_1_MSVC2019_64bit-Debug/temp.txt
qml: currentFile: file:///C:/Users/kgron/Projects/build-savedialogtester-Desktop_Qt_6_2_1_MSVC2019_64bit-Debug/temp.txt

Actual output:
qml: selectedFile:
qml: currentFile:

Notes:

• Filename gets through if you select an existing file. But with save (as) dialog user should be able to type the name.
• I'm guessing this may have come with https://codereview.qt-project.org/c/qt/qtdeclarative/+/381801 but haven't tested.