UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3418.2 Safari/537.36

Steps to reproduce the problem:
Previously, having an incognito window open meant that any links clicked in outside applications would open a new tab in the incognito window instead of the non-incognito window.

What is the expected behavior?

What went wrong?
This is not the case anymore.

Did this work before? Yes a few weeks ago?

Chrome version: 68.0.3418.2  Channel: n/a
OS Version: OS X 10.13.4
Flash Version: 

I wouldn’t have cared had Chrome been less aggressive about saving history and using it for the omnibox.