MouseArea does not receive release event

[Mr .Wu]

The Demo code :

MouseArea{
    id:btnTest
    anchor.fill:parent
}


Connections{
    target:btnTest
    onPressed:console.log("===>Pressed")
    onCanceled:console.log("===>Canceled")
    onReleased:console.log("===>Released")
    onClicked:console.log("===>Clicked")
    onDoubleClicked:console.log("===>DoubleClicked")
}

This demo program is running on our device . When we do click test, it can print the correct log correctly.
But when we do stress tests (quick, frequent hits), we find that sometimes there is a missing release event , We only received the press event . After that, we can't receive any events by clicking on this control

Our Device is a Linux Embedded device . used On Qt_5.8 . Arm platform.