Tested the issue in Android and able to reproduce the issue. Similar behavior is observed since Chrome #60.0.3072.0

Steps Followed:
1. Launched the Chrome Browser.
2. Navigate to the URL: m.aoshu.com
3. Tap on hamburger menu on top right of the screen.
4. Try to scroll across the page.
5. Observed that user is not able to scroll smoothly.

Chrome versions tested:
60.0.3072.0, 64.0.3282.137(Stable), 66.0.3352.3(Canary)

OS:
Android 8.1.0

Android Devices:
Pixel

This seems to be a Non-Regression issue as same behavior is seen since M60.  Untriaged for further input's on this issue.

Please navigate to below link for log's and video--
go/chrome-androidlogs/815039

Note: 
1. This issue is not observed in Desktop.
2. Issue is not observed on FireFox mobile version.

This is a problem with pointer events and this page. The menu is a custom scroller and they are trying to prevent default page scrolling due to it.

It works correctly if touch-action: none is applied to the demo box.

It works correctly in FireFox because it hasn't enabled pointer events yet.

Hi, thanks for you explanation. But I have some questions, could you help to clarify?

--It works correctly if touch-action: none is applied to the demo box.
>>> what's the mean of "demo box"?  Do you mean if I disable the custom scroller, the page scrolling works well?

It works correctly in FireFox because it hasn't enabled pointer events yet.
>>> I tried disabled PointerEvent feature in chrome by changing the value to FEATURE_DISABLED_BY_DEFAULT in content/public/common/content_features.cc, but the issue still happens, if I miss something else?

I understood the comments, thanks.

The same issue details in iscroll.js:
https://github.com/cubiq/iscroll/issues/1100