UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2723.3 Safari/537.36

Example URL:
https://www.google.com/search?q=you+vs+yourself

Steps to reproduce the problem:
1. enable GPU rasterization at chrome://flags/#enable-gpu-rasterization
2. open any page with boxshadow CSS

What is the expected behavior?
the quick answer panel should be white with a shadow around

What went wrong?
the quick answer panel is dark gray as though its background is transparent and only the shadow is painted

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes a couple of Dev versions before 52.0.2723.3

Does this work in other browsers? Yes 

Chrome version: 52.0.2723.3  Channel: dev
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 22.0 r0

Screenshot: https://i.imgur.com/sYvCxWR.png