UserAgent: Mozilla/5.0 (X11; CrOS x86_64 11151.59.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.94 Safari/537.36
Platform: 11151.59.0 (Official Build) stable-channel guado

Example URL:
https://webrtc.github.io/samples/src/content/devices/input-output/

Steps to reproduce the problem:
1. ASUS Chromebox CN62
2. plugin a Logi Rally camera and a Logi C920 camera
3. open 1 Chrome tab for  https://webrtc.github.io/samples/src/content/devices/input-output/
4. select Logi Rally camera as video source
5. duplicate this tab
6. try to select another camera

What is the expected behavior?
another camera can work

What went wrong?
another camera can't work

Did this work before? N/A 

Is it a problem with Flash or HTML5? HTML5

Does this work in other browsers? N/A

Chrome version: 71.0.3578.94  Channel: stable
OS Version: 11151.59.0
Flash Version: 

Contents of chrome://gpu: 

Logitech Meetup + Logitech C920 is OK (can work simultaneously)