FastBlurItem prevents Button from drawing properly or receiving mouse events?

  • Just playing around with the FastBlurItem component, and I notice it seems to break any control placed inside it? The following contrived example shows what I'm seeing in Qt Design Studio 1.5.0.

    import QtQuick 2.12
    import QtQuick.Controls 2.3
    import QtGraphicalEffects 1.0
    import QtQuick.Studio.Effects 1.0
    Pane {
        id: _root
        width: 600
        height: 600
        Button {
            text: "This is a button"
            anchors.centerIn: parent
            onClicked:"First button clicked!")
        FastBlurItem {
            anchors.fill: parent
            radius: 10
            Button {
                text: "Blurred button"
                anchors.topMargin: 20
                anchors.left: parent.left
                anchors.leftMargin: 20
                onClicked:"Blurred button clicked!")
        Button {
            text: "This is another button"
            anchors.left: parent.left
            anchors.verticalCenter: parent.verticalCenter
            onClicked:"Other button clicked!")

    In the form editor, the Button inside the FastBlurItem doesn't even display visually anymore, though it is still selectable. When previewing, the button text appears blurred, but the button rectangle itself doesn't draw, and it is no longer clickable.
    The other two buttons work as expected.

    So...does this mean FastBlurItem eats mouse events? Is it not possible to place controls within one?

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