UserAgent: Mozilla/5.0 (X11; CrOS x86_64 11210.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3593.0 Safari/537.36
Platform: 11210.0.0 (Official Build) dev-channel samus

Steps to reproduce the problem:
Tested on Samus (Chromebook Pixel 2015)

1. Connect 2 external displays via USB-C
2. Connect mouse and keyboard via USB-A
3. Close laptop (this step is optional)
4. Try and use launcher on 2nd external display

What is the expected behavior?
Launcher works on 2nd external display just like on the 1st external display.

What went wrong?
Launcher fails to launch on 2nd external display.

Did this work before? Yes not sure, probably before 71, ie. it worked on m70 but not on m71 and m72

Chrome version: 72.0.3593.0  Channel: dev
OS Version: 11210.0.0
Flash Version: 

See video: https://www.youtube.com/watch?v=5D1KBXmyst4

This is also reproducible on Chromebox Guado (CN62).