Symptom 1:

The keyboard is non-responsive when running in Kiosk mode though it is responsive at the Citrix login in kiosk mode (users can enter their username and password) but becomes non-responsive inside the Citrix session. 

Symptom 2: 

1. Launch CWA for Chrome OS desktop session
2. Go to the full screen using the toolbar
3. Press Escape

Expected: Session to remain as is

Observed: Session falls back to Windowed mode. If the session was in multi-monitor mode, it falls back to a single monitor

Further,

1. Open the Excel application within the session
2. Do a Ctrl+Shift+Down arrow key shortcut

Expected: Excel column to get selected

Observed: The toolbar is expanded 

1. Navigate to the 'configuration.js' file in the ChromeApp root folder.
2. Set enable  to false under features -> enable and then save the file
     'features' :
      {
        'accessibility': {
           'enable': false
          },
      }

Problem Cause

This is caused by the accessibility feature in the Workspace app