UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36

Steps to reproduce the problem:
1. scroll to bottom
2. scroll up 75% (not fully up) 

What is the expected behavior?
The header should stick to top

What went wrong?
The header does not stick to top and jumps around. If you remove the z-index on "sticky-header"-class it does work perfect.

Did this work before? No 

Does this work in other browsers? Yes

Chrome version: 56.0.2924.76  Channel: stable
OS Version: Ubuntu 16.04
Flash Version: Shockwave Flash 24.0 r0

What does the JS do in the example: It does the header behavior like in google play store.

 

Deleted: stickyError_converted.mp4 4.2 MB

	stickyError_converted.mp4 4.2 MB View Download

Deleted: sticky.html 32.0 KB

sticky.html 32.0 KB View Download