There is an issue with the Parallax Background component whereas having two or more of it causes image stutter -- the image is jumpy the parallax effect is not smooth.
If you choose the same image for the other Parallax components, the issue goes away. Also, when the issue is present, previewing it on Firefox and Internet Explorer shows the issue but Google Chrome seems to handle it very well.
I'm not sure if this was covered before and was addressed in another thread but I tried searching and I did not find the same issue/topic.
Please let me know if there is a workaround or are we just stuck with one Parallax background per page?