In case you observe graphics distortions with the sessions launched with the Citrix Workspace app for Chrome OS 2108.2, please follow the steps below.
 

You can disable the support for Enhanced Graphics using one of the ways mentioned below. Choose a method that suits you best.
For more details refer https://docs.citrix.com/en-us/citrix-workspace-app-for-chrome/get-started.html

Configuration.js

To disable the support for Enhanced Graphics using the configuration.js file (located in the ChromeApp root folder), using the following path: HTML5_CONFIG -> features -> graphics and set the 'useThinwireV2' attribute to 'false'.
By default this is enabled, 'useThinwireV2' is set to true.

Google Admin Console

To disable the support for Enhanced Graphics using the Google admin policy, change the ‘useThinwireV2’ value to ‘false’ as follows,
{
    "settings": {
        "Value": {
            "settings_version": "1.0",
            "engine_settings": {
                "features": {
                   "graphics": {
                        "useThinwireV2": false
                  }
              }
           }
       }
    }
}

Web.config

To disable support for Enhanced Graphics for Bring your own device (BYOD) users (only for those using on-prem StoreFront):
Follow the steps in Get started - Using webconfig ((https://docs.citrix.com/en-us/citrix-workspace-app-for-chrome/get-started.html#using-webconfig)) and set the chromeAppPreferences value as follows:
chromeAppPreferences='{"features" : {"graphics" : {"useThinwireV2" : false}}}'
 

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Problem Cause

Potentially unsupported Citrix Virtual Apps & desktop versions or the use of ‘Legacy Graphics mode’ policy, when not applicable.