UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36

Steps to reproduce the problem:
1. the demo is here https://jsfiddle.net/lnwu/514rqz77/
2. setup a list with a span and set each list a border right
3. set the span display in inline-block

What is the expected behavior?
each list should have a border right

What went wrong?
The last list in each row has no border right.

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 64.0.3282.140  Channel: stable
OS Version: OS X 10.13.3
Flash Version: Shockwave Flash 28.0 r0

I don't know if this is a particular optimization or Bug, but it's different from firefox.