Grid's move transiton occurs on add too, add transition not in use at all

This with the latest QML from qt/qt-qml.

This move transition seems to execute not only on move, but also on add operations:

move: Transition {
    NumberAnimation {
        properties: "x,y"
        easing.type: "OutBounce"
    }
}

While this add transition never runs:

add: Transition {
            PropertyAnimation { property: "scale"; from: 0; to: 1; }
}

Incidentally, the above "add" transition doesn't run when set as a "move" transition either, so maybe it is not defined correctly?
However, the above "move" transition does not run on add operations if redefined as a "add" transition.

Does this issue apply to Row and Column layouts too?