UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3379.0 Safari/537.36

Steps to reproduce the problem:
Sorry this isn't all that reduced of a test case, but I'm guessing it doesn't need to be, to witness/dissect the issue. 

1. Navigate to this url -> http://output.jsbin.com/gedurer/11
2. Click the blue header to cycle to the "pager--overlap" style of scrolling.
3. Scroll horizontally between pages
4. In a lackadaisical manner, try scrolling the individual pages vertically between the snapping of the horizontal snapping.
5. Notice the horizontal snapping will often freeze, and not at a scroll snap position.

PS!!!

It seems that the scrollWidth of the scroll snapped element sometimes has trouble knowing it can scroll. This is seen by the fact that you have to cycle to the "pager--overlap" state of the example. In Safari, you can scroll snap any of the states. In Chrome, it seems like one must cycle to other styles of scrolling first, to get scrolling triggered, then resize the window, and cycle back to the other styles of scrolling, to finally get the browser to understand that the pages always have the width to scroll horizontally.

What is the expected behavior?
Not to compare to safari, but it seems they have this figured out and the snapping will always ease to snap position, even when scrolling descendent scroll containers. 

What went wrong?
Scroll snap behavior freezing when a scroll of descendant element begins.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 67.0.3379.0  Channel: canary
OS Version: OS X 10.12.6
Flash Version: