QML MouseArea event propagation get wrong signal on visible change

Set one item to visible by double click on panel's mousearea. This item covers whole panel with mousearea itself.

Try a few time, when the top item is visible, it will receive panel's click event on the first click.

Output message by sample:

btm Press
btm Release
btm Press
btm Release
btm Double click
btm Release
top Press
top Release
top Press
top Release
top Press
top Release
top Double click
btm Press
btm Release
btm Press
btm Release
btm Press
btm Release
btm Double click --> visible top Item
btm Release
"btm Press" --> first click will receive panel's click event
"btm Release"
top Release
top Press
top Release
top Press
top Release

If I implement mouse event by c++ extension, and signal mouse event to QML. The output message will correct!!!