Consider the following QML code:

Image {
id: icon
...
RotationAnimation on rotation

{ id: animation .... alwaysRunToEnd: false loops: Animation.Infinite running: false }

MouseArea {
anchors.fill: parent
onClicked:

{ animation.running = !animation.running; console.log(animation.running); }

}
}

If alwaysRunToEnd property is true and the image is clicked repeatedly, the animation gets stuck and runs forever. Also, the messages printed to the console show that the running property gets stuck to false. On the other hand, if alwaysRunToEnd is false, there is no such problem. See the attached code for an example.