Spark hangs while log off from Terminal-Server 2012R2

Hi!

We are using Spark (2.6.3) and Openfire (3.8.2) as IM.

Now we are switching from normal PCs to a Terminal-Server 2012R2 and Citrix XenApp/XenDesktop environment.

The problem is now, that when Spark is running on the Termianl-Server and the user is signin off the sign-off-process hangs.

I have to kill the terminal-session manually. I think this problem depens on Windows Terminal-Server 2012R2 because we have tested it on Windows Termial-Server 2008R2 an there it works.

the problem only shows up when the user is or was signed-in in Spark. When Spark only is started but not logged in signin of from Windows was no problem.

I've also tried to exit Spark before signing off Windows but here it hangs also.

Does anyone have these problems?

MfG Bernd