TreeView's item delegate receiving empty strings as styleData.value

[Citron]

Hi,

I noticed a weird behavior of the delegates in TreeView's and TreeViewColumn's : the styleData.value sometimes is an empty string, no matter the type of the item it should receive.

For instance, if you take the 'Qt Qui Controls - File System Browser' example, and you modify slightly the the Name column:

    TableViewColumn {
        title: "Name"
        role: "fileName"
        resizable: true

        delegate: Text {
            text: {
                console.log(this, styleData.value);
                return styleData.value;
            }
        }
    }

It will output the following:

qml: QQuickText(0xb30c310) C:
qml: QQuickText(0xb30c310) C:
qml: QQuickText(0xb303090) 
qml: QQuickText(0xb303090) G:
qml: QQuickText(0x59e82f0) 
qml: QQuickText(0x59e82f0) E:
qml: QQuickText(0x4b89250) 
qml: QQuickText(0x4b89250) D:
qml: QQuickText(0xb30c310) C:
qml: QQuickText(0xb303090) G:
qml: QQuickText(0x59e82f0) E:
qml: QQuickText(0x4b89250) D:

It doesn't really make sense to me ... why would the delegate corresponding to my C: item be called 3 times with the correct fileName while the delegate for the G: drive is called once with an empty string, and twice with the correct fileName ?

Any idea what's going on ?