When dragging an item using the Drag API in QtQuick, the mouse cursor position is off.

This is hard to describe in words, but let me try:

In QtWidget land, the drag behavior basically follows this principle (easy to verify by dragging some widgets in a QtDesigner form):

1) Mouse press and hold
2) Move cursor
3) Eventually Qt interprets mouse move as drag
4) Underlying item is immediately moved to the mouse position when a drag is registered
5) Underlying item is further moved in sync with the mouse cursor

In QtQuick, this is slightly different:
Basically, step (4) is missing here.
Because of this, the cursor is off when further dragging the item.

Attached the slightly modified example from http://qt-project.org/doc/qt-5/qml-qtquick-drag.html#details.

How to reproduce:
Drag the red rectangle about (50,50) pixels

What I'd expected as example output:
press: 5, 6
release: 5, 6

But what you get is something along:
press: 5, 6
release: 10, 17