UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.81 Safari/537.36

Steps to reproduce the problem:
1. Go to https://www.example.com/
2. Focus the omnibox and put the cursor at the beginning of the full url
Where the pipe character is:
|https://www.example.com/
3. Hold shift and press the down key once

What is the expected behavior?
The url should be fully selected.

What went wrong?
The url was not selected.

Did this work before? Yes 

Chrome version: 69.0.3497.81  Channel: stable
OS Version: OS X 10.13.6
Flash Version: 

Hold shift and pressing the up key once also no longer works as expected.
Put the cursor where the pipe character is:
https://www.example.com/|
Hold shift and press the up key once.
The url should be selected, but it is not.