Crash of a simple MouseArea when injecting touch event

I have two components:

• a QML app that contains a simple MouseArea
• an exe that inject touch event

Touching the mouseArea while injecting touch events make the qml app crash.

The QML code:

import QtQuick 2.12

Rectangle{
    id: root
    width: 1920
    height: 1080
    color: "blue"
    MouseArea{
        anchors.fill: parent
        enabled: true
    }
}

You can inject touch events with this example. (you probably want to add Sleep(1000) before the InjectTouchInput call)

It crash every time with Qt 5.12. I can't reproduce this bug with Qt 5.8, but I had crash that look similar with more complex/messy QML app.