UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

Example URL:
http://impulse-gesundheitszentrum.de/seminare.php

Steps to reproduce the problem:
1. Open a site which provides *.php documents
2. Try to scroll down/up with mousewheel

What is the expected behavior?

What went wrong?
It's not possible to scroll with the mousewheel on sites which provides *.php sites.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes don't know exactly

Does this work in other browsers? Yes

Chrome version: 61.0.3163.100  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: