UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36

Example URL:
http://blog.issuu.com/post/152267812033/beauty-brains-passion-craft-meet-the-new-issuu

Steps to reproduce the problem:
1. Scroll down to the magazine above the "Make the Most of #newissuu" line
2. Click on the orange cover image to give it focus
3. Scroll slowly down and watch it disappear

What is the expected behavior?
The cover image should be there all the time

What went wrong?
Chrome is for some reason clearing the webgl canvas by a mistake

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 54.0.2840.71  Channel: n/a
OS Version: OS X 10.11.4
Flash Version: 

I can reproduce it on both mac and my android phone and outside an iframe and on a local development version as well. I can also reproduce with slightly modified code where the CPU profiling from developer tools reports no javascript execution at all (apart from "program" and "idle") while the error occurs. For some reason it is not reproducible here: https://issuu.com/nicoleissuu/docs/oj__1_1, even though almost all of the code is the same.
In chrome://trace it looks like some compositing stuff is happening as the problem occur that doesn't happen before, but I don't know enough about chrome to interpret it