UserAgent: Mozilla/5.0 (X11; CrOS x86_64 11151.45.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.71 Safari/537.36
Platform: 11151.45.0 (Official Build) beta-channel eve

Steps to reproduce the problem:
1. Plug in external monitor. Aligned with external monitor on top, internal monitor on bottom
2. press the Assistant key on the keyboard
3. play hide and seek with your assistant

What is the expected behavior?
that I can actually see the assistant

What went wrong?
the assistant is hiding in the lower left corner of the external monitor so far down you can barely see it. If you hide the shelf, you can click it, but the assistant isn't click and dragable so that doesn't help.

Did this work before? N/A 

Chrome version: 71.0.3578.71  Channel: beta
OS Version: 11151.45.0
Flash Version: 31.0.0.153 

If I unplug the monitor, the assistant is visible where it's supposed to be.

The issue only happens if you're in an active window on the external monitor. If you're in an active window on the internal monitor, the assistant opens where it's supposed to.