UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36

Steps to reproduce the problem:
https://codepen.io/anon/pen/BrRPGe .  - needs security disabled . - cross domain

What is the expected behavior?
Web worker should close the connection when terminated

What went wrong?
When the web worker is terminated with .terminate() the HTTP request is not terminated in developer tools. It worked before.

Did this work before? Yes 

Chrome version: 65.0.3325.181  Channel: stable
OS Version: OS X 10.13.3
Flash Version: