• User disconnect their session after work, but they will get a new session during next launch.
• Command ctxsession -v shows the session is presented in the previous Linux VDA.
• The disconnected session has disappeared from Citrix Studio, so DDC will broker a new session for the user.
•  /opt/Citrix/VDA/bin/ctxreg dump | grep -i ctxsession shows connection id and ctxsession id is different.

• Temp session ID(used for reconnection)is written to registry by mistake.
• Linux VDA cannot find the disconnected session during the re-registration process, 0 session is reported to DDC.
• DDC terminates the session from Citrix Studio based on the VDA's information.

Code change is made to prevent the wrong session ID to be written. The code fix is included in 2402 CU3, upgrade Linux VDA to fix the issue.

https://www.citrix.com/downloads/citrix-virtual-apps-and-desktops/components/linux-vda-2402-ltsr-cu3.html

Session disappears from the citrix studio even the session is still on the Liux VDA.