In the example from QTBUG-62912 (https://bugreports.qt.io/browse/QTBUG-62912), the MouseAreas trigger hoverEvents (MouseArea.containsMouse) unreliable. The buttons in the same example work fine.

Reproduce:
Move the finger on a touch screen over the four MouseAreas in the left column.

Expected behavior:
All four MouseAreas change color due to the change in MouseArea.containsMouse.

Observed behavior:
The upper 2 mouseAreas behave as expected, the lower 2 mouseAreas do not change color when moving the finger over them. However, they do when the finger is lifted and pressed on the respective position.