REG: Popup position changes after opening once

This issue affects Components that use a Popup to display content, for example Menu and ComboBox. It becomes apparent when using the Material style.

Steps to reproduce for ComboBox:

1. open ComboBox
2. close ComboBox
3. open ComboBox again, notice that the Popup of the ComboBox is slightly y translated

The Menu components shows a similar behavior after opening it once, with the difference that its Popup is translated in x direction.

The issue seems to be caused by the fact that ComboBox animates the scale of its Popup.
Fix/Workaround: by replacing the default exit animation with one that doesn't animate the scale the issue disappears.

Most likely the fix for QTBUG-84488 caused this issue.

import QtQuick 2.15
import QtQuick.Controls 2.15

ApplicationWindow {
    width: 300
    height: 300
    visible: true

    ComboBox {
        model: 10
        anchors.verticalCenter: parent.verticalCenter
    }
}