Transaction doesn't work for GestureStateGesture

[shial4]

Describe the bug
Transaction inside gestures .onChange, doesn't work, below code should animate rectangle fill color between the states.

To Reproduce
Steps to reproduce the behavior:

Rectangle()
                    .fill(self.isDetectingLongPress ? Color.pink : (self.completedLongPress ? Color.purple : Color.gray))
                    .frame(width: 100, height: 100)
                    .gesture(LongPressGesture(minimumDuration: 2)
                        .updating($isDetectingLongPress) { currentState, gestureState, transaction in
                            gestureState = currentState
                            transaction.animation = Animation.easeIn(duration: 2.0)
                        }
                        .onEnded { finished in
                            self.completedLongPress = finished
                        })

Expected behavior
Rectangle should be animated.

[shial4]

#538 (comment)