QtQuick MouseArea missing release event when creating a custom QDrag

There is an Item with a MouseArea filling it that creates a custom QDrag when the Item is pressed (as described in http://doc.qt.io/qt-5/dnd.html ). After performing the drop anywhere, the Item MouseArea does not notify the release event.

Steps for reproducing the issue:

• start the drag by pressing the top Rectangle and drop anywhere
• after dropping, try to move the mouse cursor over the bottom rectangle, which should change its fill color on hovering or when being pressed
• notice that the bottom rectangle does not change color until the mouse is clicked again (i.e., the repeated click causes the MouseArea to send the release event which was not sent before). This can be seen also in the logs.

NOTE: With Qt 5.9.1 the release event is correctly notified.