QML/Windows: setting the cursor to QCursor(Qt::BlankCursor) on a secondary display sets it to random pixels

To trigger this bug, you need:

• multiple displays (the desktop must be extended, not duplicated)
• different scaling settings for the displays (e.g. 125% for the main display and 100% for the secondary) (Windows Settings --> System --> Display --> Scale and layout)
• hide the cursor on a display that isn't the main one (The cursor must be visible inside the window before it is hidden to trigger the bug.)

import QtQuick 2.7
import QtQuick.Controls 2.0

ApplicationWindow {
    visible: true
    width: 600
    height: 600


    Rectangle {
        width:  500
        height: 500
        color: "red"


        MouseArea {
            anchors.fill: parent
            cursorShape: Qt.BlankCursor
        }
    }
}

This doesn't happen, when the cursor is set to an empty one:

QBitmap zero_bitmap(32, 32);
zero_bitmap.clear();
QGuiApplication::setOverrideCursor(QCursor(zero_bitmap, zero_bitmap));

The attached image shows a pattern that appeared, when the cursor was hidden on a red background:

• black pixels
• white pixels
• red pixels (transparent cursor pixels)
• cyan pixels (XOR'd red background pixels)