strange behaviors.

[BMeridian]

I like this plugin!

I am using on mobile (android). weird things happen.

1> using your demo and numbering the purple boxes (thnk for the demo)
on scroll up, the boxes jump back down back into view ( you need to change height main).

2> after you scroll up, the last purple box does not leave view. if header is say height 500px., then scroll all the way down and back-up. the last purple box last in the view.

any help to figure out, why?