QML QQuickItem: Binding loop detected for property "y" - false positive?

NickAger

I think I am seeing some false positives from the QML binding loop detector.

As an example:

From within Design Studio:

Add New ...
Select "Qt Quick Controls"
Select "Custom Dial"
Give it a name
Insert newly created custom dial onto a page
Run project
In the Application Output window see the warnings: ....MyProjectContent/DialControl.ui.qml:31:9: QML QQuickItem: Binding loop detected for property "y"

Line 31 reads:

       y: control.background.y + control.background.height / 2 - height / 2

the complete qml for the control is:

/*
This is a UI file (.ui.qml) that is intended to be edited in Qt Design Studio only.
It is supposed to be strictly declarative and only uses a subset of QML. If you edit
this file manually, you might introduce QML code that is not supported by Qt Design Studio.
Check out https://doc.qt.io/qtcreator/creator-quick-ui-forms.html for details on .ui.qml files.
*/
import QtQuick
import QtQuick.Controls

Dial {
    id: control
    property alias controlEnabled: control.enabled
    background: backgroundRect
    Rectangle {
        id: backgroundRect
        x: control.width / 2 - width / 2
        y: control.height / 2 - height / 2
        implicitWidth: Math.max(64, Math.min(control.width, control.height))
        implicitHeight: width
        color: "transparent"
        radius: control.width / 2
        border.color: "#047eff"
        border.width: 2
    }

    handle: Item {
        id: handleParent
        x: control.background.x + control.background.width / 2 - width / 2
        y: control.background.y + control.background.height / 2 - height / 2
        transform: [
            Translate {
                y: -Math.min(
                       control.background.width,
                       control.background.height) * 0.4 + handleParent.height / 2
            },
            Rotation {
                angle: control.angle
                origin.x: handleParent.width / 2
                origin.y: handleParent.height / 2
            }
        ]
        width: handleItem.width
        height: handleItem.height
    }

    Rectangle {
        id: handleItem
        parent: handleParent

        width: 16
        height: 16
        color: "#047eff"
        radius: 8
        border.color: "#047eff"
        antialiasing: true
    }
    states: [
        State {
            name: "normal"
            when: !control.pressed && control.enabled

            PropertyChanges {
                target: handleItem
                color: "#047eff"
            }
        },
        State {
            name: "disabled"
            when: !control.enabled

            PropertyChanges {
                target: handleItem
                opacity: 1
                color: "#7f047eff"
                border.color: "#00000000"
            }

            PropertyChanges {
                target: background
                opacity: 0.3
            }

            PropertyChanges {
                target: backgroundRect
                border.color: "#7f047eff"
            }
        },
        State {
            name: "pressed"
            when: control.pressed

            PropertyChanges {
                target: handleItem
                color: "#047eff"
                border.color: "#ffffff"
            }

            PropertyChanges {
                target: backgroundRect
                border.color: "#047eff"
            }
        }
    ]
}

Is there a binding loop here, or is this a false positive, or is this a bug with the Design Studio "Custom Dial"?

Using: Qt Design Studio 4.6 (4.6.2)
Targeting Qt 6.8

NickAger

Is is also odd that the binding loop detector does not complain about the line above where is it claiming a binding loop which ostensibly appears to be binding in a similar way: x: control.background.x + control.background.width / 2 - width / 2

Correction
if I reorder these two lines I do get a binding loop warning for x: control.background.x + control.background.width / 2 - width / 2 but not for y: control.background.y + control.background.height / 2 - height / 2