If you watch the video of what you call "Normal Operation" the ball 1, 2, & 3 50 pt bonus count adds a 10 pt spot to the lap as the bonus counts down.
I'm not entirely sure if this correct, but I will say that my very own Snow Derby does this as well. This only occurs during a 50 point bonus count(ball 1, 2, 3 on 5 ball setting).
My view is that it may possibly add 50 points to a score and that is not substantial enough to worry about.
Although I do suspect the AS relay may be in need of tweaking still.
Or, maybe Snow Derby just does this.
Any other owners wish to chime in?
Fun fact;
Snow derby was the first bonus game!
And they had to make it complicated by having it 50, 100, and 200 points per bonus.