UserAgent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.101 Safari/537.36

Steps to reproduce the problem:
https://jsfiddle.net/dbjvwcz1/
1. Click the slider button and hold left mouse down.
2. Still holding the left mouse down, right click.
3. Release the left mouse button.
4. Click outside the frame.

Also
1. Click the slider button and hold left mouse down.
2. Drag mouse outside the frame
3. Still holding the left mouse, right click
4. Release left mouse button

What is the expected behavior?
Mouseup should be sent to the button via capture regardless of whether the right mouse button is pressed.

What went wrong?
Mouseup is not sent to the slider button.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 60.0.3112.101  Channel: n/a
OS Version: 6.3
Flash Version: 

This works in IE & Edge.
Seems somewhat related to https://bugs.chromium.org/p/chromium/issues/detail?id=506801