DragHandler will be always activated if gesture started outside its area

Example code:

import QtQuick 2.13
import QtQuick.Controls 2.13

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    Rectangle {
        y: 150
        width: 50
        height: 50
        color: "blue"

        TapHandler {
            grabPermissions: PointerHandler.TakeOverForbidden
        }
    }

    Rectangle {
        id: rectangle

        x: 100
        y: 100
        width: 200
        height: 200
        color: dragHandler.active ? "red" : "orange"
        opacity: 0.8

        DragHandler {
            id: dragHandler
            grabPermissions: PointerHandler.TakeOverForbidden
        }
    }
}

Steps to reproduce of the problems:

• Press and hold mouse on the blue rectangle and drag in the direction of orange rectangle

or:

• Press and hold mouse outside of the blue or orange rectangles and drag in the direction of orange rectangle

Results: 

It is not possible to prevent grab of the event in the DragHandler if the event started outside the area of the orange rectangle. This type of DragHandler behavior can lead to side effects and unwanted activation of some DragHandler, so it would be good to have some mechanism to control this behavior if it is not desired. Aside from this problem, the orange rectangle jumps unsightly when dragging begins (see: https://bugreports.qt.io/browse/QTBUG-77638)