Client not showing in Win/Citrix/Terminal Server session


When starting RC client in a Citrix session, then no window nor an icon is showing up. Process keeps running at server under the user name.
Previous Windows Server 2008R2 with Citrix 7.15 worked fine, we just switched to WinServer 2019 with Citrix VAD 1912 (apps).
When I start Rocket.Chat client 3.0.7 on the WinServer directly (not in an terminal server session), then everything is working fine.

Server Setup Information

  • Version of Rocket.Chat Server: 3.9.0
  • Operating System: Linux
  • Deployment Method: tar
  • Number of Running Instances: 1
  • DB Replicaset Oplog: Yes
  • NodeJS Version: 12.18.4
  • MongoDB Version: 4.0.20
  • Proxy: none
  • Firewalls involved: no firewalls

Any additional Information

Problem solved!

It’s working after having installed the latest Cumulative Update of Citrix.