Bindings are disabled for width/height of items inside Flex

[nuttyartist]

Hello, thanks for this great repo! I think Flexbox is an awesome an idea. I know it's been a long time since you've worked on this repo but one thing I noticed is that bindings to the width/height properties of items inside a Flex item aren't working.

For example, in the following example below, rect2 won't update its width when the with of the window changes, like it should.

import QtQuick

Window {
    id: root
    visible: true
    height: 400
    width: 675

    property bool isMobile: width < 550

    Flex {
        flexDirection:  root.isMobile ? "column" : "row"
        anchors.fill: parent
        flexWrap: "noWrap"
        justifyContent: "spaceBetween"
        alignItems: "center"
        alignSelf: "center"
        alignContent: "stretch"

        Rectangle {
            width: 200
            height: 200
            color: "blue"
        }

        Rectangle {
            id: rect2
            width: root.width * 0.5
            height: 200
            color: "red"
        }

    }
}

Adding the following code does make it work, tho:

onWidthChanged: {
    rect2.width = root.width * 0.5
}

I wonder why the bindings suddenly don't work?