I gave it a once over with Novus 1 a few weeks ago and it did make it play too fast for my liking. The ball was flying all over the place and I was struggling to get any multi-balls going which I can usually manage to get quite regularly. I'm still waiting for it to settle down a bit.Just polished your game by any chance...?
Usually is a sign that the rubbers need replacing.I've had it a couple of times on different games. First time it drove me crazy looking for the missing ball I've always thought it might be something to do with the slingshot rubbers getting a little older so maybe the have slightly more give so they have just enough stretch to let the ball through. No scientific basis for this, just a random assumption.