mouse area stuck in pressed state

mouse area got stuck in pressed state while handling with both touch and mouse  inputs simultaneously.

steps: 

i have a soft keyboard item which contains many keys(buttons) in it.
if i press a button(first) with finger(touch) , and with out releasing this button, if i click on different button(second) with mouse, second button click executed successfully,but even after taking finger off the first button i pressed , first button stayed in pressed state.

more info can be found at original Question asked in Qt forum:

https://forum.qt.io/topic/101596/simulating-mouse-area-release-event/8