UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.1.1 Safari/603.2.4

Example URL:

Steps to reproduce the problem:
1. open http://mzabriskie.github.io/react-draggable/example/
2. make window small enought to have scrollbars there
2. Drag draggable square to the bottom edge of browser window 

What is the expected behavior?
Window starts to scroll

What went wrong?
Window does not scroll

Does it occur on multiple sites: N/A

Is it a problem with a plugin? No 

Did this work before? Yes 56.0.2924.76

Does this work in other browsers? Yes

Chrome version:  59.0.3071.115 (Official Build) (64-bit)  Channel: stable
OS Version: OS X 10.12.5
Flash Version: 

It stops working in GC 57.0.2987.133