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During a recent customer engagement, I encountered an interesting Citrix issue: LCM-22664.
In the affected environment, both Citrix Workspace App and the Citrix Virtual Delivery Agent (VDA) were installed on the same Windows system.
🔴 The problem
During the investigation, I noticed that registry monitoring by the Citrix Telemetry Service was not working as expected.
The cause was a Citrix-documented issue with Workspace App 2402 LTSR CU4 when installed alongside a VDA.
This combination is particularly common in nested Citrix environments.
🔍 My approach
✅ Checked the installed Workspace App and VDA versions
✅ Investigated the Citrix Telemetry Service
✅ Reviewed the registry configuration and telemetry logs
✅ Compared the symptoms with Citrix Known Issue LCM-22664
🛠 The fix
Citrix resolved the issue in Workspace App 2402 LTSR CU4 Hotfix 1.
My recommendation: validate the hotfix on a test VDA before deploying it to production.
💡 My takeaway
Not every Citrix issue manifests as an ICA disconnect or a failed logon.
Sometimes the session itself works correctly while the diagnostic infrastructure is impaired in the background.
And that can become a problem during the next troubleshooting exercise.
📌 Citrix issue: LCM-22664
📚 Source: Citrix Workspace App 2402 LTSR CU4 – Fixed Issues
