FileDialog fails opening iCloud file on iOS

With Qt 6.3.2, the QtQuick.Dialogs FileDialog was able to open files from iCloud and other networked storage services such as Google drive. With Qt 6.5.3 and 6.6.1, it is not able to open these files. The UI allows the user to select files from iCloud or Drive, but there is an error message and the file URI returned is empty.

On MacOS, opening iCloud files works fine with all versions.

To reproduce the issue, open any example using Qt 6.5.3 or 6.6.1 for iOS, and paste the following QML code

import QtQuick
import QtQuick.Dialogs
import QtQuick.Controls

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World"){{    }}

    FileDialog
    {
            id: fileDialog
            modality: Qt.WindowModal            onAccepted:
            {
                console.log("selectedFile:  ",  selectedFile)
{{            }}}
            onRejected:
            {
                console.log("FileDialog: Rejected")
{{            }}}
{{    }}}{{    }}

    Button {
        anchors.centerIn: parent

        text: "Open single file"
        onClicked:  {
                fileDialog.fileMode = FileDialog.OpenFile;
                fileDialog.open();
{{        }}}
{{    }}}
}{}

Click the button and select a file from iCloud. Watch the console output. With Qt 6.3.2 I get a valid file:

qml: selectedFile:      file:///private/var/mobile/Containers/Data/Application/B52E99C4-E7F6-4144-A55D-C16C16D53768/tmp/com.memorymap.apptestfileopen-Inbox/P1.gpx

with Qt 6.5.3 I get the error message on the console and the selected file property is empty.

qrc:/testfileopen/Main.qml:14:5: QML FileDialog: Cannot set /private/var/mobile/Library/Mobile Documents/com~apple~CloudDocs/Documents/P1.gpx as a selected file because it doesn't exist

{{qml: selectedFile:      }}