UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3464.2 Safari/537.36

Steps to reproduce the problem:
1. Enable experimental UI (the one with the ugly white menus) — UI Layout for the browser's top chrome → not “Normal”, although it’s random for me
2. Attempt to use the services menu of macOS inside a page (eg. select something, right click, attempt to go to Services)

What is the expected behavior?

What went wrong?
The Services menu is not displaye.d

Did this work before? Yes it works when the new menu is not used

Chrome version: 69.0.3464.2  Channel: dev
OS Version: OS X 10.13.5
Flash Version: 

The new plain-white menus look terrible, waste a lot of screen space, and feel odd.