Citrix Studio tries to upload data to Google Analytics (POST http://www.google-analytics.com/collect HTTP/1.1).

Third-Party Security tools detect this traffic and may show the alert. 

Example from Vector Security Network Cybersecurity Tool:

Citrix Studio is attempting to connect to Google Analytics website https://www.google-analytics.com

POST http://www.google-analytics.com/collect HTTP/1.1

Content-Type: application/x-www-form-urlencoded

User-Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 10.0

Host: www.google-analytics.com

Content-Length: 204

Expect: 100-continue

Alerts cease when the Studio console is closed and resumes upon relaunching the Citrix Studio.

To disable the collection of Google analytics data, update following setting in the registry on the machine where Citrix Studio is installed:

1. Open Registry Editor (regedit).
2. Navigate to registry Path: HKLM\Software\Citrix\DesktopStudio
3. Edit the value for following DWORD value: "GAEnabled".
4. Set the value to '0'. A value of 1 enables collection and upload, and a value of 0 disables collection and upload.

Problem Cause

Google Analytics are collected (and later uploaded) automatically when you install (or upgrade) Citrix Studio.

https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/install-configure/install-prepare.html#during-installation-of-any-component

Google Analytics has been deprecated for Web Studio.