UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3198.0 Safari/537.36

Example URL:

Steps to reproduce the problem:
1. Open any page with a text box. 
2. Add enough content so the text box needs to scroll
3. If necessary, scroll the textbox. 

What is the expected behavior?
Content appears normally.

What went wrong?
Content is a bunch of black, and occasional repeats of the graphics on the page. 

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes previous dev version

Does this work in other browsers? Yes

Chrome version: 62.0.3198.0  Channel: dev
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

This is a flag issue, I realize. But it is a useful feature that got borked. Cleartype-style text often looks bad, and is a big deal to many, many users. 

Plus the bug is just weird. Why would it cause that? It's likely this bug affects other things, or will down the line.