Quoted from Rake:

Hey guys,
Does anyone ever have a problem with the right orbit having the ball seemingly hit something on it's way through and never making it all the way through? This is a recent problem for me and I can't for the life of me figure out what's happening. The ball will get about 3/4 of the way in, just to about where the first pop bumper is and then it's like it hits something. It rattles and goes off into the bumpers. It doesn't do it all the time, maybe 1 out of 10 shots or so, but it's enough to be annoying as it's a new problem.
The only thing that's "changed" is a week ago I took the glass off and cleaned and waxed it for the first time. But I was exceptionally careful all around and nothing looks out of place. I have noticed the balls are going really fast now that it's all waxed up, so could it be something to do with the speed and having not-perfect shots to the orbit just not making it through because of that? That seems like it would be odd but it's the only thing I know of that changed. It could also be, obviously, coincidence that it happened after I cleaned it but I really don't see anything that it could be catching on.
I've tried to catch it when it happens but for the life of me I can't figure it out.
Thoughts?