Bug with animated CircleNode modifier

[IanGClifton]

There's a subtle bug with this code:

class CircleNode(var color: Color) : Modifier.Node(), DrawModifierNode {
    private val alpha = Animatable(1f)

    override fun ContentDrawScope.draw() {
        drawCircle(color = color, alpha = alpha.value)
        drawContent()
    }

    override fun onAttach() {
        coroutineScope.launch {
            alpha.animateTo(
                0f,
                infiniteRepeatable(tween(1000), RepeatMode.Reverse)
            ) {
            }
        }
    }
}

Alpha is initially set to 1f and animated toward 0f. This works as expected until the Node is reused. If you scroll inside a lazy list, the Node will be reused and its value will be somewhere between 0f and 1f, so let's say 0.5f. When it is attached, alpha.animateTo will now animated from 0f to 0.5f. If you continue to scroll, this node will keep getting reattached with a smaller and smaller animation alpha until the animation is effectively not noticeable (though still running).