UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36

Example URL:
http://silberschauer.de

Steps to reproduce the problem:
1. just scroll down

What is the expected behavior?
content should get offsetted

What went wrong?
content does not get offsetted, clipping moves downward.

Does it occur on multiple sites: N/A

Is it a problem with a plugin? No 

Did this work before? Yes some days before

Does this work in other browsers? Yes 

Chrome version: 53.0.2785.116  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 23.0 r0

As i didnt change anything and it obviously work in FF and IE im pretty sure its chromium.