Overlapping same-gesture areas with different start touches broken

From an email of a Darren West:

I am trying to setup two or more touch areas occupying the same space, one with a 3 finger and one with a 4 finger subscription, however, whichever is declared last will then block the previous topAreas signals and the subscription looks like it gets confused with how many fingers are required. So:

UTouchTapArea {
 subscription {
         touches.start : 3
        }
        onGestureOccurred : console.log( '3 finger tap')
        anchors.fill : parent
}

UTouchTapArea {
        subscription {
  touches.start : 4
        }
        onGestureOccurred : console.log( '4 finger tap')
        anchors.fill : parent
}

Will log '4 finger tap' regardless of whether it was a 3 or 4 finger tap!