UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36

Example URL:
https://stackoverflow.com/questions/53551277/maybe-a-chrome-bug-mouse-wheel-scrolling-does-not-work-on-the-top-composition-l

Steps to reproduce the problem:
1. open the test.html
2. scroll the pop-up, which contains content “1. a 2.b ...”, using mouse wheel 
3. no scrolling occurs to pop-up
4.
  4.1 please comment out `transform: translateZ(0);` in the test.html and goto 1
  4.1 or resize the window to force a re-render
5. scrolling occurs to pop-up

What is the expected behavior?
"pop-up" is always scrollable

What went wrong?
"pop-up" is scrollable only when page is re-rendered or no composition layer is created.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 70.0.3538.110  Channel: stable
OS Version: OS X 10.13.6
Flash Version: 

"pop-up" is not scrollable on:

chromium 72.0.3626.0
google chrome 70.0.3538.110

but scrollable on:
Safari Edge Firefox
 

Deleted: test.html 2.8 KB

test.html 2.8 KB View Download