When reparenting a control that uses IconLabel (like Button) and has a binding to its parents height, its text will stop being rendered when the control is reparented back

Simplified example

import QtQuick 2.3
import QtQuick.Controls 2.3

ApplicationWindow {
    id: window
    visible: true
    width: 640
    height: 480
    title: qsTr("Stack")

    Button {
        text: "Toggle parent between Window and empty Item"
        anchors.bottom: parent.bottom
        onClicked: button.parent = (button.parent === window.contentItem ? emptyItem : window.contentItem)
    }

    Item {
        id: emptyItem
    }

    Button {
        id: button
        text: "Button"
        width: parent.width
        height: parent.height / 3
        onHeightChanged: print(height)
    }
}

Original use case

When having a stackview and pushing a form that has ListView with Button as delegate, twice, the Button texts disappear. The Button needs to use the listview as a reference in height calculation for this to happen:

This is not reproducible if the height is set to specific size, such as 50pixels.

Resizing the Window so small that the list items disappear and then resizing the Window back makes the texts appear again.

Steps to reproduce:

• Run attached sample (main.qml) with qmlscene
• Open Drawer -> Page 2
• Go back (to close Page 2)
• Open Drawer -> Page 2 again
• EXPECTED: UI looks exactly the same no matter how many times the form is shown
• ACTUAL: Button texts become invisible after second time the form is pushed to stackview