some MouseArea's signals are weirdly triggered

Hi, I think I have been through a bug in the MouseArea

first point: It is about onPositionChanged signal. I can't find out why this signal is not triggered when the mouse enters for the first time in the MouseArea. I did not see this behavior if I use the mouseDrag function instead of mouseMove.

second point: on the project I linked the onExited signal triggers inexplicably in the middle of the test

this is the kind of output I got

```

QDEBUG : MouseArea::test_mouse_move() qml: move to -1,-1
QDEBUG : MouseArea::test_mouse_move() qml: move to 25,25
QDEBUG : MouseArea::test_mouse_move() qml: onEntered
QDEBUG : MouseArea::test_mouse_move() qml: move to 50,50
QDEBUG : MouseArea::test_mouse_move() qml: onPositionChanged 50 , 50
QDEBUG : MouseArea::test_mouse_move() qml: move to 100,100
QDEBUG : MouseArea::test_mouse_move() qml: onExited
QDEBUG : MouseArea::test_mouse_move() qml: move to 150,150
QDEBUG : MouseArea::test_mouse_move() qml: onEntered
QDEBUG : MouseArea::test_mouse_move() qml: move to 175,175
QDEBUG : MouseArea::test_mouse_move() qml: onPositionChanged 175 , 175

```

~_{same output with Qt 5.15.2 as Qt 6.5.3}~

erratum: the second point shows up only with Qt6. The rest of the bug remains unchanged

What do you think ? Am I missing something ?