UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.78 Safari/537.36

Example URL:
https://jsfiddle.net/79tkumrh/2/

Steps to reproduce the problem:
1. Create a scrollable container with overflow: auto
2. Fill it with content that is larger than the viewport both vertically and horizontally.
3. This will add two scrollbars:
 - vertical - at the page level
- horizontal - inside the scrollable container
4. Add a draggable element on the page ("Drag me")
5. Start dragging it towards edges of the window.

- (ok) When you drag it to left/right sides the scrollable container auto scrolls properly.
- (ok) When you drag it to the top edge (given the page has been scrolled down previously), the page auto-scrolls upwards.
- (issue) When you drag it to the bottom edge, no scrolling happens.

The issue seems to only happen when there is a scrollable container (overflow:auto) on the page. If I change it to overflow:hidden, vertical auto-scrolling starts working well (however, apparently no horizontal scrolling is available in this case, so it's not a solution for me).

In Firefox auto-scroll to bottom works well in the same scenario.

JSFiddle with the demo: https://jsfiddle.net/79tkumrh/2/

What is the expected behavior?
When dragging the draggable element to the bottom edge of the window, the page should automatically scroll down.

What went wrong?
When dragging the draggable element to the bottom edge, no scrolling happens.

Does it occur on multiple sites: N/A

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 60.0.3112.78  Channel: stable
OS Version: OS X 10.12.6
Flash Version: