Package: x2goclient
Version: 4.1.2.2 or 4.1.1.1

Environment:
Client: Ubuntu 18.04 LTS, 64-bit, freshly installed and fully updated,
running X2Go Client v. 4.1.2.2 (Qt - 4.8.7). Machine is a Dell Vostro 15
3000 laptop, with an external monitor connected and the lid shut.
Server OS: Ubuntu 16.04.1 LTS, x2goserver 4.1.0.3

Steps to reproduce:
1. Start with a typical local desktop session (tested on default Ubuntu
desktop as well as Cinnamon), with at least one window open (say, a web
browser or email client).
2. In X2Go define a session: set the session name, host, login, check "try
auto login". Session type: Single application, choose "Terminal" from the
drop-down.
3. Start this session. X2Go will connect and a "Konsole" window will
appear. [note: if you get a different terminal, go back to step 2 and type
"konsole" as the requested remote application. Konsole is not the only
terminal to exhibit this bug but is the easiest to reproduce it with.]
4. Type something in the terminal, "hello", whatever.
5. Now try to switch to another window using Alt-Tab or clicking on the
task bar icon representing that window.

When I perform these steps the requested window does not appear and the
Konsole remains on top and in focus. The only way to return to normal
behavior is to minimize the Konsole window.