UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36
Platform:  65.0.3325.81

Steps to reproduce the problem:

Scenario 1:
1. Boot the chrome book with External display connected (DP/HDMI) and enter the credentials to login
2. Swap the external monitor to Primary mode by pressing Alt+F4 
3. Open the settingsDisplay settings change the DP/HDMI resolution to lowest resolution
4. Click on the eDP display and change the eDP resolution one by one 
5. Again try to change the external monitor resolution
Scenario 2:
1. Connect 2 external monitors by plugging in to both USB-C ports
2. Click on the lower right-hand corner of the system tray/shelf
3. Click on Settings and go to Display Settings
4. Select the representation of 1 external display
5. In the Resolution slider box, change the slider to lower resolution (720x400)
6. Select the representation of the other external display, change the slider to lower resolution (720x400)
7. Again try to change the external monitor resolution via settings page

What is the expected behavior?

Able to change the external monitor resolution via settings page and resolution changes must be reflected in the external monitor

What went wrong?
Once after changing external monitor resolution to lower resolution unable to change the resolution again, unable to select the external display in settings page 

Did this work before? N/A 

Chrome version:  65.0.3325.81  Channel: dev
OS Version: 
Flash Version: