UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.67 Safari/537.36

Steps to reproduce the problem:
1. flex container with overflow:auto
2. flex child with flex:none
3. set height of flex child in javascript event queue
https://codepen.io/examan/pen/jezrvq

What is the expected behavior?
The horizontal scrollbar should be available.
It works in Firefox and Edge.

What went wrong?
The horizontal scrollbar is unavailable.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 70.0.3538.67  Channel: stable
OS Version: 10.0
Flash Version: