Low framerate using PinchArea/PinchHandler

This is something I've been noticing for quite some time in Qt Quick applications. When using a a PinchArea or PinchHandler, the frame rate of the qt quick scenegraph seems to unexpectedly drop to about 30fps. I can reproduce the problem with the following code:

import QtQuick 2.15
import QtQuick.Window 2.15

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    Rectangle{
        width: 400
        height: 500
        color: "green"
        PinchHandler{}
    }
}

The issue can be reproduced by repeatedly pinching in and out, this causes some drops in frame rate (I've tested in Release mode obviously). Other animations like scrolling don't suffer from the issue from my testing. I've also logged the scenegraph events by enabling qt.scenegraph.time.renderloop and I have attached a logging sample of the events pinchlog.txt

I couldn't reproduce the issue with a 100% reliability, but it occurs frequently enough.